256653888 has 56 divisors (see below), whose sum is σ = 680240448. Its totient is φ = 85403136.

The previous prime is 256653883. The next prime is 256653889. The reversal of 256653888 is 888356652.

It is a self number, because there is not a number n which added to its sum of digits gives 256653888.

It is not an unprimeable number, because it can be changed into a prime (256653883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209245 + ... + 210467.

Almost surely, 2^256653888 is an apocalyptic number.

It is an amenable number.

256653888 is an abundant number, since it is smaller than the sum of its proper divisors (423586560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256653888 is a wasteful number, since it uses less digits than its factorization.

256653888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2331 (or 2321 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 51.

The square root of 256653888 is about 16020.4209682517. The cubic root of 256653888 is about 635.5005770349.

The spelling of 256653888 in words is "two hundred fifty-six million, six hundred fifty-three thousand, eight hundred eighty-eight".