256464236 has 18 divisors (see below), whose sum is σ = 522088308. Its totient is φ = 109913160.

The previous prime is 256464233. The next prime is 256464251. The reversal of 256464236 is 632464652.

It is a self number, because there is not a number n which added to its sum of digits gives 256464236.

It is not an unprimeable number, because it can be changed into a prime (256464233) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 654050 + ... + 654441.

It is an arithmetic number, because the mean of its divisors is an integer number (29004906).

Almost surely, 2^256464236 is an apocalyptic number.

It is an amenable number.

256464236 is an abundant number, since it is smaller than the sum of its proper divisors (265624072).

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

256464236 is a wasteful number, since it uses less digits than its factorization.

256464236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308509 (or 1308500 counting only the distinct ones).

The product of its digits is 207360, while the sum is 38.

The square root of 256464236 is about 16014.5008039589. The cubic root of 256464236 is about 635.3440060523.

The spelling of 256464236 in words is "two hundred fifty-six million, four hundred sixty-four thousand, two hundred thirty-six".