40
Number 40 (forty) is an even two-digits composite number and natural number following 39 and preceding 41.
| Nominal | 40 |
| Cardinal | forty |
| Ordinal | 40th |
| Number of digits | 2 |
| Sum of digits | 4 |
| Product of digits | 0 |
| Number parity | Even |
Calculation was done in 0.0000429153 seconds
| Prime factorization | 2 x 2 x 2 x 5 |
| Prime factorization in exponent form | 23 x 5 |
| Prime factors | 2, 5 |
| Number of distinct prime factors ω(n) | 2 |
| Total number of prime factors Ω(n) | 4 |
| Sum of prime factors | 7 |
| Product of prime factors | 10 |
Calculation was done in 0.0000100136 seconds
| List of proper divisors | 1, 2, 4, 5, 8, 10, 20 |
| List of all dividers | 1, 2, 4, 5, 8, 10, 20, 40 |
| Number of divisors d(n) | 8 |
| Sum of all divisors σ(n) | 90 |
| Aliquot sum | 50 |
| 40 is an abundant number , because the sum of its proper divisors (50) is greater than itself. Its abundance is 10. |
Calculation was done in 0.0000269413 seconds
| Is 40 a prime number? | No |
| Is 40 a semiprime number? | No |
| Is 40 a Chen prime number? | No |
| Is 40 a Mersenne prime number? | No |
Calculation was done in 0.0000140667 seconds
| Is 40 a Catalan number? | No |
| Is 40 a Fibonacci number? | No |
| Is 40 a Idoneal number? | Yes: I23 |
Calculation was done in 0.0000050068 seconds
| 40 is not a Happy number |
| 40 is a Humble number |
| 40 is not a Münchhausen number |
| 40 is not a Perfect number |
| 40 is not a Perfect square |
| 40 is not a Palindrome |
Calculation was done in 0.0065391064 seconds
| Base | System | Value |
|---|
| 2 | Binary | 1010002 |
| 3 | Ternary | 11113 |
| 4 | Quaternary | 2204 |
| 5 | Quinary | 1305 |
| 6 | Senary | 1046 |
| 7 | Septenary | 557 |
| 8 | Octal | 508 |
| 9 | Nonary | 449 |
| 10 | Decimal | 40 |
| 12 | Duodecimal | 3412 |
| 16 | Hexadecimal | 2816 |
| 20 | Vigesimal | 2020 |
| 36 | Base36 | 1436 |
| 60 | Sexagesimal | e60 |
Calculation was done in 0.0000200272 seconds
| Square of 40 (n2) | 1600 |
| Cube of 40 (n3) | 64000 |
| Square root of 40 | 6.3245553203368 |
| Natural Logarithm (ln) of 40 | 3.6888794541139 |
| Decimal Logarithm (log) of 40 | 1.602059991328 |
Calculation was done in 0.0000059605 seconds
| Sine of 40 | 0.74511316047935 |
| Cosecant of 40 | 1.3420780265868 |
| Cosine of 40 | -0.66693806165226 |
| Secant of 40 | -1.4993896097677 |
| Tangent of 40 | -1.1172149309239 |
| Cotangent of 40 | -0.89508291763791 |
Calculation was done in 0.0000119209 seconds
Is 40 an Even Number?
Yes, the number 40 is an even number.
Previous even number is
38
Calculation was done in 0.0000038147 seconds
| The spelling of 40 in words is "forty", meaning that: |
| 40 is an aban number (a number without the letter a) |
| 40 is an eban number (a number without the letter e) |
| 40 is an iban number (a number without the letter i) |
| 40 is not an oban number (as it contains the letter o) |
| 40 is not a tban number (as it contains the letter t) |
| 40 is an uban number (a number without the letter u) |
Calculation was done in 0.0000038147 seconds
| Bengali numerals | ৪০ |
| Eastern Arabic numerals | ٤٠ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓎉 |
| Khmer numerals | ៤០ |
| Japanese numerals | 四十 |
| Roman numerals | XL |
| Thai numerals | ๔๐ |
Calculation was done in 0.0000751019 seconds
| Arabic | أربعون |
| Croatian | četrdeset |
| Czech | čtyřicet |
| Danish | fyrre |
| Dutch | veertig |
| Estonian | blaene |
| Faroese | fýrati |
| Filipino | ápat na pû |
| Finnish | neljäkymmentä |
| French | quarante |
| Greek | σαράντα |
| German | vierzig |
| Hebrew | ארבעים |
| Hindi | चालीस |
| Hungarian | negyven |
| Icelandic | fjörutíu |
| Indonesian | empat puluh |
| Italian | quaranta |
| Japanese | 四十 |
| Korean | 사십 |
| Latvian | četrdesmit |
| Lithuanian | keturiasdešimt |
| Norwegian | førti |
| Persian | چهل |
| Polish | czterdzieści |
| Portuguese | quarenta |
| Romanian | patruzeci |
| Russian | сорок |
| Serbian | четрдесет |
| Slovak | štyridsať |
| Slovene | štirideset |
| Spanish | cuarenta |
| Swahili | arobaini |
| Swedish | fyrtio |
| Thai | สี่สิบ |
| Turkish | kırk |
| Ukrainian | сорок |
| Vietnamese | bốn mươi |
Calculation was done in 0.0220391750 seconds
| Number 40 reversed | 04 |
| ASCII Code | 40 | ( |
| Unicode Character | U+0028 | ( |
| Unix Timestamp | Thu, 01 Jan 1970 00:00:40 +0000 |
Calculation was done in 0.0000360012 seconds
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