72532724 has 18 divisors (see below), whose sum is σ = 139521522. Its totient is φ = 32969200.

The previous prime is 72532717. The next prime is 72532739. The reversal of 72532724 is 42723527.

It can be written as a sum of positive squares in only one way, i.e., 54316900 + 18215824 = 7370^2 + 4268^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 74447 + ... + 75414.

Almost surely, 2^72532724 is an apocalyptic number.

It is an amenable number.

72532724 is a deficient number, since it is larger than the sum of its proper divisors (66988798).

72532724 is a wasteful number, since it uses less digits than its factorization.

72532724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149887 (or 149874 counting only the distinct ones).

The product of its digits is 23520, while the sum is 32.

The square root of 72532724 is about 8516.6145856203. The cubic root of 72532724 is about 417.0402727620.

The spelling of 72532724 in words is "seventy-two million, five hundred thirty-two thousand, seven hundred twenty-four".