72629864 has 8 divisors (see below), whose sum is σ = 136181010. Its totient is φ = 36314928.

The previous prime is 72629857. The next prime is 72629867. The reversal of 72629864 is 46892627.

It can be written as a sum of positive squares in only one way, i.e., 72420100 + 209764 = 8510^2 + 458^2 .

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

It is not an unprimeable number, because it can be changed into a prime (72629867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4539359 + ... + 4539374.

Almost surely, 2^72629864 is an apocalyptic number.

It is an amenable number.

72629864 is a deficient number, since it is larger than the sum of its proper divisors (63551146).

72629864 is a wasteful number, since it uses less digits than its factorization.

72629864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9078739 (or 9078735 counting only the distinct ones).

The product of its digits is 290304, while the sum is 44.

The square root of 72629864 is about 8522.3156477568. The cubic root of 72629864 is about 417.2263644932.

The spelling of 72629864 in words is "seventy-two million, six hundred twenty-nine thousand, eight hundred sixty-four".