72536864 has 12 divisors (see below), whose sum is σ = 142807014. Its totient is φ = 36268416.

The previous prime is 72536843. The next prime is 72536873. The reversal of 72536864 is 46863527.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 39589264 + 32947600 = 6292^2 + 5740^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1133357 + ... + 1133420.

Almost surely, 2^72536864 is an apocalyptic number.

It is an amenable number.

72536864 is a deficient number, since it is larger than the sum of its proper divisors (70270150).

72536864 is a wasteful number, since it uses less digits than its factorization.

72536864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2266787 (or 2266779 counting only the distinct ones).

The product of its digits is 241920, while the sum is 41.

The square root of 72536864 is about 8516.8576364760. The cubic root of 72536864 is about 417.0482071756.

The spelling of 72536864 in words is "seventy-two million, five hundred thirty-six thousand, eight hundred sixty-four".