72766172 has 6 divisors (see below), whose sum is σ = 127340808. Its totient is φ = 36383084.

The previous prime is 72766139. The next prime is 72766193. The reversal of 72766172 is 27166727.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 9095768 + ... + 9095775.

It is an arithmetic number, because the mean of its divisors is an integer number (21223468).

Almost surely, 2^72766172 is an apocalyptic number.

It is an amenable number.

72766172 is a deficient number, since it is larger than the sum of its proper divisors (54574636).

72766172 is a wasteful number, since it uses less digits than its factorization.

72766172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18191547 (or 18191545 counting only the distinct ones).

The product of its digits is 49392, while the sum is 38.

The square root of 72766172 is about 8530.3090213661. The cubic root of 72766172 is about 417.4872110536.

The spelling of 72766172 in words is "seventy-two million, seven hundred sixty-six thousand, one hundred seventy-two".