715864128 has 84 divisors (see below), whose sum is σ = 2203319952. Its totient is φ = 204529920.

The previous prime is 715864091. The next prime is 715864147. The reversal of 715864128 is 821468517.

It is a tau number, because it is divible by the number of its divisors (84).

It is a super-2 number, since 2×715864128² = 1024922899514400768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 715864128.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28638 + ... + 47453.

Almost surely, 2^715864128 is an apocalyptic number.

It is an amenable number.

715864128 is an abundant number, since it is smaller than the sum of its proper divisors (1487455824).

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

715864128 is a wasteful number, since it uses less digits than its factorization.

715864128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76120 (or 76103 counting only the distinct ones).

The product of its digits is 107520, while the sum is 42.

The square root of 715864128 is about 26755.6373125366. The cubic root of 715864128 is about 894.5614938327.

The spelling of 715864128 in words is "seven hundred fifteen million, eight hundred sixty-four thousand, one hundred twenty-eight".