256413538 has 4 divisors (see below), whose sum is σ = 384620310. Its totient is φ = 128206768.

The previous prime is 256413503. The next prime is 256413551. The reversal of 256413538 is 835314652.

256413538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 252905409 + 3508129 = 15903^2 + 1873^2 .

It is a junction number, because it is equal to n+sod(n) for n = 256413497 and 256413506.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64103383 + ... + 64103386.

Almost surely, 2^256413538 is an apocalyptic number.

256413538 is a deficient number, since it is larger than the sum of its proper divisors (128206772).

256413538 is a wasteful number, since it uses less digits than its factorization.

256413538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128206771.

The product of its digits is 86400, while the sum is 37.

The square root of 256413538 is about 16012.9178477878. The cubic root of 256413538 is about 635.3021382352.

The spelling of 256413538 in words is "two hundred fifty-six million, four hundred thirteen thousand, five hundred thirty-eight".