72323732 has 12 divisors (see below), whose sum is σ = 136302516. Its totient is φ = 33380160.

The previous prime is 72323723. The next prime is 72323759. The reversal of 72323732 is 23732327.

It can be written as a sum of positive squares in 2 ways, for example, as 41809156 + 30514576 = 6466^2 + 5524^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72323695 and 72323704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 695369 + ... + 695472.

It is an arithmetic number, because the mean of its divisors is an integer number (11358543).

Almost surely, 2^72323732 is an apocalyptic number.

It is an amenable number.

72323732 is a deficient number, since it is larger than the sum of its proper divisors (63978784).

72323732 is a wasteful number, since it uses less digits than its factorization.

72323732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390858 (or 1390856 counting only the distinct ones).

The product of its digits is 10584, while the sum is 29.

The square root of 72323732 is about 8504.3360704996. The cubic root of 72323732 is about 416.6393414258.

The spelling of 72323732 in words is "seventy-two million, three hundred twenty-three thousand, seven hundred thirty-two".