72728008 has 16 divisors (see below), whose sum is σ = 136524060. Its totient is φ = 36321600.

The previous prime is 72727987. The next prime is 72728011. The reversal of 72728008 is 80082727.

It can be written as a sum of positive squares in 2 ways, for example, as 65318724 + 7409284 = 8082^2 + 2722^2 .

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, 2698 + ... + 12358.

Almost surely, 2^72728008 is an apocalyptic number.

It is an amenable number.

72728008 is a deficient number, since it is larger than the sum of its proper divisors (63796052).

72728008 is a wasteful number, since it uses less digits than its factorization.

72728008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10608 (or 10604 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 72728008 is about 8528.0717633003. The cubic root of 72728008 is about 417.4142111611.

The spelling of 72728008 in words is "seventy-two million, seven hundred twenty-eight thousand, eight".