864044736 has 28 divisors (see below), whose sum is σ = 2286118872. Its totient is φ = 288014848.

The previous prime is 864044729. The next prime is 864044759. The reversal of 864044736 is 637440468.

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, 2249925 + ... + 2250308.

Almost surely, 2^864044736 is an apocalyptic number.

It is an amenable number.

864044736 is an abundant number, since it is smaller than the sum of its proper divisors (1422074136).

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

864044736 is a wasteful number, since it uses less digits than its factorization.

864044736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4500248 (or 4500238 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 42.

The square root of 864044736 is about 29394.6378783614. The cubic root of 864044736 is about 952.4570693170.

The spelling of 864044736 in words is "eight hundred sixty-four million, forty-four thousand, seven hundred thirty-six".