256294038928 has 40 divisors (see below), whose sum is σ = 499923192600. Its totient is φ = 127284301824.

The previous prime is 256294038907. The next prime is 256294038971. The reversal of 256294038928 is 829830492652.

It can be written as a sum of positive squares in 4 ways, for example, as 8517074944 + 247776963984 = 92288^2 + 497772^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1440708 + ... + 1608796.

It is an arithmetic number, because the mean of its divisors is an integer number (12498079815).

Almost surely, 2^256294038928 is an apocalyptic number.

It is an amenable number.

256294038928 is a deficient number, since it is larger than the sum of its proper divisors (243629153672).

256294038928 is a wasteful number, since it uses less digits than its factorization.

256294038928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168739 (or 168733 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 58.

The spelling of 256294038928 in words is "two hundred fifty-six billion, two hundred ninety-four million, thirty-eight thousand, nine hundred twenty-eight".