72113992 has 8 divisors (see below), whose sum is σ = 135213750. Its totient is φ = 36056992.

The previous prime is 72113959. The next prime is 72114011. The reversal of 72113992 is 29931127.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 48358116 + 23755876 = 6954^2 + 4874^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4507117 + ... + 4507132.

Almost surely, 2^72113992 is an apocalyptic number.

It is an amenable number.

72113992 is a deficient number, since it is larger than the sum of its proper divisors (63099758).

72113992 is a wasteful number, since it uses less digits than its factorization.

72113992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9014255 (or 9014251 counting only the distinct ones).

The product of its digits is 6804, while the sum is 34.

The square root of 72113992 is about 8491.9957607149. The cubic root of 72113992 is about 416.2361978428.

The spelling of 72113992 in words is "seventy-two million, one hundred thirteen thousand, nine hundred ninety-two".