864629256 has 16 divisors (see below), whose sum is σ = 2161573200. Its totient is φ = 288209744.

The previous prime is 864629239. The next prime is 864629291. The reversal of 864629256 is 652926468.

It is a happy number.

It is a super-2 number, since 2×864629256² = 1495167500662227072, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18013086 + ... + 18013133.

It is an arithmetic number, because the mean of its divisors is an integer number (135098325).

Almost surely, 2^864629256 is an apocalyptic number.

It is an amenable number.

864629256 is an abundant number, since it is smaller than the sum of its proper divisors (1296943944).

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

864629256 is a wasteful number, since it uses less digits than its factorization.

864629256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36026228 (or 36026224 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 48.

The square root of 864629256 is about 29404.5788271147. The cubic root of 864629256 is about 952.6717976711.

The spelling of 864629256 in words is "eight hundred sixty-four million, six hundred twenty-nine thousand, two hundred fifty-six".