256872688 has 20 divisors (see below), whose sum is σ = 498529600. Its totient is φ = 128219904.

The previous prime is 256872683. The next prime is 256872689. The reversal of 256872688 is 886278652.

256872688 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256872683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3513 + ... + 22936.

It is an arithmetic number, because the mean of its divisors is an integer number (24926480).

Almost surely, 2^256872688 is an apocalyptic number.

It is an amenable number.

256872688 is a deficient number, since it is larger than the sum of its proper divisors (241656912).

256872688 is a wasteful number, since it uses less digits than its factorization.

256872688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27064 (or 27058 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 52.

The square root of 256872688 is about 16027.2482978208. The cubic root of 256872688 is about 635.6811159348.

The spelling of 256872688 in words is "two hundred fifty-six million, eight hundred seventy-two thousand, six hundred eighty-eight".