256438924 has 24 divisors (see below), whose sum is σ = 513440928. Its totient is φ = 109781760.

The previous prime is 256438883. The next prime is 256438927. The reversal of 256438924 is 429834652.

256438924 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (256438927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23844 + ... + 32884.

It is an arithmetic number, because the mean of its divisors is an integer number (21393372).

Almost surely, 2^256438924 is an apocalyptic number.

It is an amenable number.

256438924 is an abundant number, since it is smaller than the sum of its proper divisors (257002004).

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

256438924 is a wasteful number, since it uses less digits than its factorization.

256438924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10065 (or 10063 counting only the distinct ones).

The product of its digits is 414720, while the sum is 43.

The square root of 256438924 is about 16013.7105006928. The cubic root of 256438924 is about 635.3231033892.

The spelling of 256438924 in words is "two hundred fifty-six million, four hundred thirty-eight thousand, nine hundred twenty-four".