72307864 has 8 divisors (see below), whose sum is σ = 135577260. Its totient is φ = 36153928.

The previous prime is 72307853. The next prime is 72307877. The reversal of 72307864 is 46870327.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4519234 + ... + 4519249.

Almost surely, 2^72307864 is an apocalyptic number.

It is an amenable number.

72307864 is a deficient number, since it is larger than the sum of its proper divisors (63269396).

72307864 is a wasteful number, since it uses less digits than its factorization.

72307864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9038489 (or 9038485 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 72307864 is about 8503.4030834719. The cubic root of 72307864 is about 416.6088686407.

The spelling of 72307864 in words is "seventy-two million, three hundred seven thousand, eight hundred sixty-four".