256406604 has 12 divisors (see below), whose sum is σ = 598282104. Its totient is φ = 85468864.

The previous prime is 256406537. The next prime is 256406617. The reversal of 256406604 is 406604652.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10683597 + ... + 10683620.

It is an arithmetic number, because the mean of its divisors is an integer number (49856842).

Almost surely, 2^256406604 is an apocalyptic number.

It is an amenable number.

256406604 is an abundant number, since it is smaller than the sum of its proper divisors (341875500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256406604 is a wasteful number, since it uses less digits than its factorization.

256406604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21367224 (or 21367222 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 256406604 is about 16012.7013336289. The cubic root of 256406604 is about 635.2964115164.

The spelling of 256406604 in words is "two hundred fifty-six million, four hundred six thousand, six hundred four".