Base | Representation |
---|---|
bin | 1111011011101… |
… | …0111011111001 |
3 | 11111210120020220 |
4 | 3312322323321 |
5 | 113032310300 |
6 | 10231210253 |
7 | 1414120530 |
oct | 366727371 |
9 | 144716226 |
10 | 64728825 |
11 | 335a07a7 |
12 | 19816989 |
13 | 105444a5 |
14 | 884d317 |
15 | 5a38da0 |
hex | 3dbaef9 |
64728825 has 48 divisors (see below), whose sum is σ = 123325440. Its totient is φ = 29344320.
The previous prime is 64728793. The next prime is 64728857. The reversal of 64728825 is 52882746.
It is a happy number.
It is an interprime number because it is at equal distance from previous prime (64728793) and next prime (64728857).
It is not a de Polignac number, because 64728825 - 25 = 64728793 is a prime.
It is a Curzon number.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 72532 + ... + 73418.
It is an arithmetic number, because the mean of its divisors is an integer number (2569280).
Almost surely, 264728825 is an apocalyptic number.
It is an amenable number.
64728825 is a deficient number, since it is larger than the sum of its proper divisors (58596615).
64728825 is a wasteful number, since it uses less digits than its factorization.
64728825 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1046 (or 1041 counting only the distinct ones).
The product of its digits is 215040, while the sum is 42.
The square root of 64728825 is about 8045.4226116469. The cubic root of 64728825 is about 401.5126578713.
The spelling of 64728825 in words is "sixty-four million, seven hundred twenty-eight thousand, eight hundred twenty-five".
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