256285136 has 20 divisors (see below), whose sum is σ = 518142432. Its totient is φ = 122570976.

The previous prime is 256285087. The next prime is 256285147. The reversal of 256285136 is 631582652.

256285136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 256285136.

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, 347846 + ... + 348581.

Almost surely, 2^256285136 is an apocalyptic number.

It is an amenable number.

256285136 is an abundant number, since it is smaller than the sum of its proper divisors (261857296).

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

256285136 is a wasteful number, since it uses less digits than its factorization.

256285136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696458 (or 696452 counting only the distinct ones).

The product of its digits is 86400, while the sum is 38.

The square root of 256285136 is about 16008.9080202242. The cubic root of 256285136 is about 635.1960756017.

The spelling of 256285136 in words is "two hundred fifty-six million, two hundred eighty-five thousand, one hundred thirty-six".