72996724 has 6 divisors (see below), whose sum is σ = 127744274. Its totient is φ = 36498360.

The previous prime is 72996719. The next prime is 72996743. The reversal of 72996724 is 42769927.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 66945124 + 6051600 = 8182^2 + 2460^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9124587 + ... + 9124594.

Almost surely, 2^72996724 is an apocalyptic number.

It is an amenable number.

72996724 is a deficient number, since it is larger than the sum of its proper divisors (54747550).

72996724 is a wasteful number, since it uses less digits than its factorization.

72996724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18249185 (or 18249183 counting only the distinct ones).

The product of its digits is 381024, while the sum is 46.

The square root of 72996724 is about 8543.8120297675. The cubic root of 72996724 is about 417.9276677112.

The spelling of 72996724 in words is "seventy-two million, nine hundred ninety-six thousand, seven hundred twenty-four".