256339136 has 28 divisors (see below), whose sum is σ = 510506472. Its totient is φ = 127707648.

The previous prime is 256339133. The next prime is 256339157. The reversal of 256339136 is 631933652.

256339136 is digitally balanced in base 2 and base 3, because in such bases 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 256339136.

It is not an unprimeable number, because it can be changed into a prime (256339133) 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, 11036 + ... + 25188.

It is an arithmetic number, because the mean of its divisors is an integer number (18232374).

Almost surely, 2^256339136 is an apocalyptic number.

It is an amenable number.

256339136 is a deficient number, since it is larger than the sum of its proper divisors (254167336).

256339136 is a wasteful number, since it uses less digits than its factorization.

256339136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14448 (or 14438 counting only the distinct ones).

The product of its digits is 87480, while the sum is 38.

The square root of 256339136 is about 16010.5944923978. The cubic root of 256339136 is about 635.2406850028.

The spelling of 256339136 in words is "two hundred fifty-six million, three hundred thirty-nine thousand, one hundred thirty-six".