256518938 has 16 divisors (see below), whose sum is σ = 415928520. Its totient is φ = 117950016.

The previous prime is 256518929. The next prime is 256518973. The reversal of 256518938 is 839815652.

256518938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 190633249 + 65885689 = 13807^2 + 8117^2 .

It is a junction number, because it is equal to n+sod(n) for n = 256518892 and 256518901.

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, 11345 + ... + 25332.

Almost surely, 2^256518938 is an apocalyptic number.

256518938 is a deficient number, since it is larger than the sum of its proper divisors (159409582).

256518938 is a wasteful number, since it uses less digits than its factorization.

256518938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36961.

The product of its digits is 518400, while the sum is 47.

The square root of 256518938 is about 16016.2086025376. The cubic root of 256518938 is about 635.3891742957.

The spelling of 256518938 in words is "two hundred fifty-six million, five hundred eighteen thousand, nine hundred thirty-eight".