256323138 has 16 divisors (see below), whose sum is σ = 512862816. Its totient is φ = 85404960.

The previous prime is 256323121. The next prime is 256323149. The reversal of 256323138 is 831323652.

256323138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 256323099 and 256323108.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9198 + ... + 24438.

It is an arithmetic number, because the mean of its divisors is an integer number (32053926).

Almost surely, 2^256323138 is an apocalyptic number.

256323138 is an abundant number, since it is smaller than the sum of its proper divisors (256539678).

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

256323138 is a wasteful number, since it uses less digits than its factorization.

256323138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18049.

The product of its digits is 25920, while the sum is 33.

The square root of 256323138 is about 16010.0948779200. The cubic root of 256323138 is about 635.2274697078.

The spelling of 256323138 in words is "two hundred fifty-six million, three hundred twenty-three thousand, one hundred thirty-eight".