| Nominal | 2640 |
| Cardinal | two thousand six hundred forty |
Cardinal two thousand six hundred forty | |
| Ordinal | 2,640th |
| Number of digits | 4 |
| Sum of digits | 12 |
| Product of digits | 0 |
| Number parity | Even |
| Prime factorization | 2 x 2 x 2 x 2 x 3 x 5 x 11 |
| Prime factorization in exponent form | 24 x 3 x 5 x 11 |
| Prime factors | 2, 3, 5, 11 |
| Number of distinct prime factors ω(n) | 4 |
| Total number of prime factors Ω(n) | 7 |
| Sum of prime factors | 21 |
| Product of prime factors | 330 |
| Is 2640 a prime number? | No |
| Is 2640 a semiprime number? | No |
| Is 2640 a Chen prime number? | No |
| Is 2640 a Mersenne prime number? | No |
| Is 2640 a Catalan number? | No |
| Is 2640 a Fibonacci number? | No |
| Is 2640 a Idoneal number? | No |
| Square of 2640 (n2) | 6969600 |
| Cube of 2640 (n3) | 18399744000 |
| Square root of 2640 | 51.380930314661 |
| Natural Logarithm (ln) of 2640 | 7.8785341961404 |
| Decimal Logarithm (log) of 2640 | 3.4216039268698 |
| Sine of 2640 | 0.87341475947871 |
| Cosecant of 2640 | 1.1449314190624 |
| Cosine of 2640 | 0.48697706098414 |
| Secant of 2640 | 2.0534848150323 |
| Tangent of 2640 | 1.7935439458147 |
| Cotangent of 2640 | 0.5575553374834 |
| The spelling of 2640 in words is "two thousand six hundred forty", meaning that: |
| 2640 is not an aban number (as it contains the letter a) |
| 2640 is not an eban number (as it contains the letter e) |
| 2640 is not an iban number (as it contains the letter i) |
| 2640 is not an oban number (as it contains the letter o) |
| 2640 is not a tban number (as it contains the letter t) |
| 2640 is not an uban number (as it contains the letter u) |
| Bengali numerals | ২৬৪০ |
| Eastern Arabic numerals | ٢٬٦٤٠ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓆼𓆼𓍧𓎉 |
| Khmer numerals | ២៦៤០ |
| Japanese numerals | 二千六百四十 |
| Roman numerals | MMDCXL |
| Thai numerals | ๒๖๔๐ |
| Arabic | ألفين و ستة مائة و أربعون |
| Croatian | dvije tisuće šeststo četrdeset |
| Czech | dvě tisíce šest set čtyřicet |
| Danish | to tusinde seks hundrede fyrre |
| Dutch | tweeduizend zeshonderdveertig |
| Estonian | akpe eve alafa ade kple blaene |
| Faroese | tvey tusin og sekshundraðogfýrati |
| Filipino | dalawáng libó’t anim na daán at ápat na pû |
| Finnish | kaksituhattakuusisataaneljäkymmentä |
| French | deux mille six cent quarante |
| Greek | δύο χίλιάδες εξακόσια σαράντα |
| German | zweitausendsechshundertvierzig |
| Hebrew | אלפיים שש מאות ארבעים |
| Hindi | दो हज़ार छह सौ चालीस |
| Hungarian | kétezerhatszáznegyven |
| Icelandic | tvö þúsund og sexhundrað og fjörutíu |
| Indonesian | dua ribu enam ratus empat puluh |
| Italian | duemilaseicentoquaranta |
| Japanese | 二千六百四十 |
| Korean | 이천육백사십 |
| Latvian | divtūkstoš sešsimt četrdesmit |
| Lithuanian | du tūkstančiai šeši šimtai keturiasdešimt |
| Norwegian | to tusen seks hundre og førti |
| Persian | دو هزار و ششصد و چهل |
| Polish | dwa tysiące sześćset czterdzieści |
| Portuguese | dois mil seiscentos e quarenta |
| Romanian | două mii şase sute patruzeci |
| Russian | две тысячи шестьсот сорок |
| Serbian | две хиљада шестсто четрдесет |
| Slovak | dve tisíc šesťsto štyridsať |
| Slovene | dvije tisuće šesto štirideset |
| Spanish | dos mil seiscientos cuarenta |
| Swahili | elfu mbili, mia sita na arobaini |
| Swedish | tvåtusensexhundrafyrtio |
| Thai | สองพันหกร้อยสี่สิบ |
| Turkish | iki bin altı yüz kırk |
| Ukrainian | дві тисячі шістсот сорок |
| Vietnamese | hai nghìn sáu trăm bốn mươi |
| Number 2640 reversed | 0462 | |
| Unicode Character | U+0A50 | |
| Unix Timestamp | Thu, 01 Jan 1970 00:44:00 +0000 | |