Prime Factorization |
27 x 5 |
Divisors |
1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640 |
Count of divisors |
16 |
Sum of divisors |
1530 |
Previous integer |
639 |
Next integer |
641 |
Is prime? |
NO |
Previous prime |
631 |
Next prime |
641 |
640th prime number |
↻ calculating, please wait |
Is a Fibonacci number? |
NO |
Zeckendorf representation |
610 + 21 + 8 + 1 |
Is a Pell number? |
NO |
Is a regular number? |
YES |
Is a perfect number? |
NO |
Is a perfect square number? |
NO |
Is a perfect cube number? |
NO |
Is power of 2? |
NO |
Is power of 3? |
NO |
Square 6402 |
409600 |
Square root √640 |
25.298221281347 |
Cube 6403 |
262144000 |
Cubic root ∛640 |
8.6177387601275 |
Natural logarithm |
6.4614681763537 |
Decimal logarithm |
2.8061799739839 |