72645604 has 12 divisors (see below), whose sum is σ = 130230828. Its totient is φ = 35436800.

The previous prime is 72645593. The next prime is 72645613. The reversal of 72645604 is 40654627.

It can be written as a sum of positive squares in 2 ways, for example, as 1276900 + 71368704 = 1130^2 + 8448^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 72645604.

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, 221317 + ... + 221644.

It is an arithmetic number, because the mean of its divisors is an integer number (10852569).

Almost surely, 2^72645604 is an apocalyptic number.

It is an amenable number.

72645604 is a deficient number, since it is larger than the sum of its proper divisors (57585224).

72645604 is a wasteful number, since it uses less digits than its factorization.

72645604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443006 (or 443004 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 72645604 is about 8523.2390556642. The cubic root of 72645604 is about 417.2565020898.

The spelling of 72645604 in words is "seventy-two million, six hundred forty-five thousand, six hundred four".