72645292 has 12 divisors (see below), whose sum is σ = 128044840. Its totient is φ = 36061056.

The previous prime is 72645289. The next prime is 72645311. The reversal of 72645292 is 29254627.

It is a happy number.

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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64773 + ... + 65884.

Almost surely, 2^72645292 is an apocalyptic number.

It is an amenable number.

72645292 is a deficient number, since it is larger than the sum of its proper divisors (55399548).

72645292 is a wasteful number, since it uses less digits than its factorization.

72645292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130800 (or 130798 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The square root of 72645292 is about 8523.2207527436. The cubic root of 72645292 is about 417.2559047414.

The spelling of 72645292 in words is "seventy-two million, six hundred forty-five thousand, two hundred ninety-two".