864188072 has 16 divisors (see below), whose sum is σ = 1767657600. Its totient is φ = 392812720.

The previous prime is 864188069. The next prime is 864188099. The reversal of 864188072 is 270881468.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 4910072 + ... + 4910247.

It is an arithmetic number, because the mean of its divisors is an integer number (110478600).

Almost surely, 2^864188072 is an apocalyptic number.

It is an amenable number.

864188072 is an abundant number, since it is smaller than the sum of its proper divisors (903469528).

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

864188072 is a wasteful number, since it uses less digits than its factorization.

864188072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9820336 (or 9820332 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 44.

The square root of 864188072 is about 29397.0759090084. The cubic root of 864188072 is about 952.5097339659.

The spelling of 864188072 in words is "eight hundred sixty-four million, one hundred eighty-eight thousand, seventy-two".