256385804 has 12 divisors (see below), whose sum is σ = 457141104. Its totient is φ = 125774064.

The previous prime is 256385749. The next prime is 256385819. The reversal of 256385804 is 408583652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 604472 + ... + 604895.

It is an arithmetic number, because the mean of its divisors is an integer number (38095092).

Almost surely, 2^256385804 is an apocalyptic number.

It is an amenable number.

256385804 is a deficient number, since it is larger than the sum of its proper divisors (200755300).

256385804 is a wasteful number, since it uses less digits than its factorization.

256385804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209424 (or 1209422 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 41.

The square root of 256385804 is about 16012.0518360390. The cubic root of 256385804 is about 635.2792323922.

The spelling of 256385804 in words is "two hundred fifty-six million, three hundred eighty-five thousand, eight hundred four".