256400524 has 12 divisors (see below), whose sum is σ = 448864024. Its totient is φ = 128153664.

The previous prime is 256400509. The next prime is 256400531. The reversal of 256400524 is 425004652.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 256400492 and 256400501.

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, 2692 + ... + 22804.

Almost surely, 2^256400524 is an apocalyptic number.

It is an amenable number.

256400524 is a deficient number, since it is larger than the sum of its proper divisors (192463500).

256400524 is a wasteful number, since it uses less digits than its factorization.

256400524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23304 (or 23302 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 256400524 is about 16012.5114832121. The cubic root of 256400524 is about 635.2913900223.

The spelling of 256400524 in words is "two hundred fifty-six million, four hundred thousand, five hundred twenty-four".