72139192 has 16 divisors (see below), whose sum is σ = 135588600. Its totient is φ = 35982240.

The previous prime is 72139183. The next prime is 72139229. The reversal of 72139192 is 29193127.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7342 + ... + 14077.

Almost surely, 2^72139192 is an apocalyptic number.

It is an amenable number.

72139192 is a deficient number, since it is larger than the sum of its proper divisors (63449408).

72139192 is a wasteful number, since it uses less digits than its factorization.

72139192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21846 (or 21842 counting only the distinct ones).

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

The square root of 72139192 is about 8493.4793812665. The cubic root of 72139192 is about 416.2846763249.

The spelling of 72139192 in words is "seventy-two million, one hundred thirty-nine thousand, one hundred ninety-two".