864840264 has 16 divisors (see below), whose sum is σ = 2162100720. Its totient is φ = 288280080.

The previous prime is 864840247. The next prime is 864840289. The reversal of 864840264 is 462048468.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18017482 + ... + 18017529.

It is an arithmetic number, because the mean of its divisors is an integer number (135131295).

Almost surely, 2^864840264 is an apocalyptic number.

It is an amenable number.

864840264 is an abundant number, since it is smaller than the sum of its proper divisors (1297260456).

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

864840264 is a wasteful number, since it uses less digits than its factorization.

864840264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36035020 (or 36035016 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 42.

The square root of 864840264 is about 29408.1666208555. The cubic root of 864840264 is about 952.7492894665.

The spelling of 864840264 in words is "eight hundred sixty-four million, eight hundred forty thousand, two hundred sixty-four".