256400572 has 12 divisors (see below), whose sum is σ = 459136216. Its totient is φ = 125218800.

The previous prime is 256400549. The next prime is 256400587. The reversal of 256400572 is 275004652.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745179 + ... + 745522.

Almost surely, 2^256400572 is an apocalyptic number.

It is an amenable number.

256400572 is a deficient number, since it is larger than the sum of its proper divisors (202735644).

256400572 is a wasteful number, since it uses less digits than its factorization.

256400572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490748 (or 1490746 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 256400572 is about 16012.5129820400. The cubic root of 256400572 is about 635.2914296660.

The spelling of 256400572 in words is "two hundred fifty-six million, four hundred thousand, five hundred seventy-two".