| Nominal | 81940 |
| Cardinal | eighty-one thousand nine hundred forty |
Cardinal eighty-one thousand nine hundred forty | |
| Ordinal | 81,940th |
| Number of digits | 5 |
| Sum of digits | 22 |
| Product of digits | 0 |
| Number parity | Even |
| Prime factorization | 2 x 2 x 5 x 17 x 241 |
| Prime factorization in exponent form | 22 x 5 x 17 x 241 |
| Prime factors | 2, 5, 17, 241 |
| Number of distinct prime factors ω(n) | 4 |
| Total number of prime factors Ω(n) | 5 |
| Sum of prime factors | 265 |
| Product of prime factors | 40970 |
| Is 81940 a prime number? | No |
| Is 81940 a semiprime number? | No |
| Is 81940 a Chen prime number? | No |
| Is 81940 a Mersenne prime number? | No |
| Is 81940 a Catalan number? | No |
| Is 81940 a Fibonacci number? | No |
| Is 81940 a Idoneal number? | No |
| Square of 81940 (n2) | 6714163600 |
| Cube of 81940 (n3) | 550158565384000 |
| Square root of 81940 | 286.2516375499 |
| Natural Logarithm (ln) of 81940 | 11.313742551101 |
| Decimal Logarithm (log) of 81940 | 4.9134959596171 |
| Sine of 81940 | 0.83072516277561 |
| Cosecant of 81940 | 1.2037675573216 |
| Cosine of 81940 | 0.55668276776943 |
| Secant of 81940 | 1.7963552276046 |
| Tangent of 81940 | 1.4922774888546 |
| Cotangent of 81940 | 0.67011665556085 |
| The spelling of 81940 in words is "eighty-one thousand nine hundred forty", meaning that: |
| 81940 is not an aban number (as it contains the letter a) |
| 81940 is not an eban number (as it contains the letter e) |
| 81940 is not an iban number (as it contains the letter i) |
| 81940 is not an oban number (as it contains the letter o) |
| 81940 is not a tban number (as it contains the letter t) |
| 81940 is not an uban number (as it contains the letter u) |
| Bengali numerals | ৮১৯৪০ |
| Eastern Arabic numerals | ٨١٬٩٤٠ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓂭𓂭𓂭𓂭𓂭𓂭𓂭𓂭𓆼𓍪𓎉 |
| Khmer numerals | ៨១៩៤០ |
| Japanese numerals | 八万千九百四十 |
| Roman numerals | n/a |
| Thai numerals | ๘๑๙๔๐ |
| Arabic | واحد و ثمانون ألف و تسعة مائة و أربعون |
| Croatian | osamdeset i jedna tisuća devetsto četrdeset |
| Czech | osmdesát jedna tisíc devět set čtyřicet |
| Danish | en og firs tusinde ni hundrede fyrre |
| Dutch | éénentachtigduizend negenhonderdveertig |
| Estonian | akpe blaenyi vɔ ɖekɛ alafa asieke kple blaene |
| Faroese | áttatieitt tusin og níggjuhundraðogfýrati |
| Filipino | walóng pû’t isáng libó’t siyám na daán at ápat na pû |
| Finnish | kahdeksankymmentäyksituhattayhdeksänsataaneljäkymmentä |
| French | quatre-vingt-un mille neuf cent quarante |
| Greek | ογδόντα μία χίλιάδες εννιακόσια σαράντα |
| German | einundachtzigtausendneunhundertvierzig |
| Hebrew | שמונים ואחד אלף תשע מאות ארבעים |
| Hindi | इक्यासी हज़ार नौ सौ चालीस |
| Hungarian | nyolcvanegyezerkilencszáznegyven |
| Icelandic | áttatíu og eitt þúsund og níuhundrað og fjörutíu |
| Indonesian | delapan puluh satu ribu sembilan ratus empat puluh |
| Italian | ottant e unmilanovecentoquaranta |
| Japanese | 八万千九百四十 |
| Korean | 팔만 천구백사십 |
| Latvian | astoņdesmit viens tūkstoši deviņsimt četrdesmit |
| Lithuanian | aštuoniasdešimt vienas tūkstantis devyni šimtai keturiasdešimt |
| Norwegian | åttiett tusen ni hundre og førti |
| Persian | هشتاد و یک هزار و نهصد و چهل |
| Polish | osiemdziesiąt jeden tysięcy dziewięćset czterdzieści |
| Portuguese | oitenta e um mil novecentos e quarenta |
| Romanian | optzeci şi una mii nouă sute patruzeci |
| Russian | восемьдесят одна тысяча девятьсот сорок |
| Serbian | осамдесет и једна хиљада деветсто четрдесет |
| Slovak | osemdesiatjedna tisíc deväťsto štyridsať |
| Slovene | osemdeset ena tisuću devetsto štirideset |
| Spanish | ochenta y un mil novecientos cuarenta |
| Swahili | elfu themanini na moja, mia tisa na arobaini |
| Swedish | åttioentusenniohundrafyrtio |
| Thai | แปดหมื่นหนึ่งพันเก้าร้อยสี่สิบ |
| Turkish | seksen bir bin dokuz yüz kırk |
| Ukrainian | вісімдесят одна тисяча девʼятсот сорок |
| Vietnamese | tám mươi mốt nghìn chín trăm bốn mươi |
| Number 81940 reversed | 04918 | |
| Unicode Character | U+14014 | |
| Unix Timestamp | Thu, 01 Jan 1970 22:45:40 +0000 | |