Names of 81440
| Nominal | 81440 |
| Cardinal | eighty-one thousand four hundred forty |
| Ordinal | 81,440th |
| This number as US currency | eighty-one thousand four hundred forty dollars |
| Is 81440 an odd number? | 81440 is NOT an odd number |
| Is 81440 an even number? | 81440 is an even number |
| Is 81440 a palindrome? | 81440 is NOT a palindrome number |
| Is 81440 a triangle number? | 81440 is NOT a triangle number |
81440 in other Bases
| Base 2 (Binary) | 100111110001000002 |
| Base 3 (Ternary) | 110102010223 |
| Base 4 (Quaternary) | 1033202004 |
| Base 5 (Quinary) | 101012305 |
| Base 6 (Senary) | 14250126 |
| Base 8 (Octal) | 2370408 |
| Base 12 (Duodecimal) | 3B16812 |
| Base 16 (Hexadecimal) | 13E2016 |
| Base 20 (Vigesimal) | A3C020 |
Primes and Factors tests for 81440
| Is 81440 a Prime Number? | 81440 is NOT a prime |
| Is 81440 a perfect number? | 81440 is NOT a perfect number |
| Is 81440 a Mersenne Prime? | 81440 is NOT a Mersenne prime |
| Is 81440 a Fermat Prime? | 81440 is NOT a Fermat prime |
| Is 81440 a Fibonacci Prime? | 81440 is NOT a Fibonacci prime |
| Is 81440 a Partition Prime? | 81440 is NOT a Partition prime |
| Is 81440 a Pell Prime? | 81440 is NOT a Pell prime |
| Prime Factors | Prime factors of 81440 |
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81440 in other Numerals
| 81440 in Roman Numeral | LXXXMCDXL |
| 81440 in Chinese Numeral | 捌萬壹仟肆佰肆拾 |
| 81440 in Egyptian Numeral | 𓂴𓆼𓍥𓎉 |
| 81440 in Babylonian Numeral |    |
Roots and stuff for 81440
| Is 81440 a square number? | 81440 is NOT a square number |
| Is 81440 a cube number? | 81440 is NOT a cube number |
| Square root of the number 81440 | 285.37694370779 |
| Cube root of the number 81440 | 43.345690098674 |
Recreational math for 81440
| Number 81440 reversed | 04418 |
| Sum of the digits | 17 |
| No of digits | 5 |