256187872 has 24 divisors (see below), whose sum is σ = 504894600. Its totient is φ = 127960704.

The previous prime is 256187857. The next prime is 256187891. The reversal of 256187872 is 278781652.

256187872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31879 + ... + 39097.

It is an arithmetic number, because the mean of its divisors is an integer number (21037275).

Almost surely, 2^256187872 is an apocalyptic number.

It is an amenable number.

256187872 is a deficient number, since it is larger than the sum of its proper divisors (248706728).

256187872 is a wasteful number, since it uses less digits than its factorization.

256187872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8338 (or 8330 counting only the distinct ones).

The product of its digits is 376320, while the sum is 46.

The square root of 256187872 is about 16005.8699232500. The cubic root of 256187872 is about 635.1157099988.

The spelling of 256187872 in words is "two hundred fifty-six million, one hundred eighty-seven thousand, eight hundred seventy-two".