256613072 has 10 divisors (see below), whose sum is σ = 497187858. Its totient is φ = 128306528.

The previous prime is 256613059. The next prime is 256613081. The reversal of 256613072 is 270316652.

It can be written as a sum of positive squares in only one way, i.e., 239506576 + 17106496 = 15476^2 + 4136^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8019143 + ... + 8019174.

Almost surely, 2^256613072 is an apocalyptic number.

It is an amenable number.

256613072 is a deficient number, since it is larger than the sum of its proper divisors (240574786).

256613072 is a wasteful number, since it uses less digits than its factorization.

256613072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16038325 (or 16038319 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 256613072 is about 16019.1470434602. The cubic root of 256613072 is about 635.4668870891.

The spelling of 256613072 in words is "two hundred fifty-six million, six hundred thirteen thousand, seventy-two".