72427732 has 24 divisors (see below), whose sum is σ = 141208200. Its totient is φ = 32274816.

The previous prime is 72427727. The next prime is 72427763. The reversal of 72427732 is 23772427.

It can be written as a sum of positive squares in 4 ways, for example, as 2972176 + 69455556 = 1724^2 + 8334^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22507 + ... + 25522.

It is an arithmetic number, because the mean of its divisors is an integer number (5883675).

Almost surely, 2^72427732 is an apocalyptic number.

It is an amenable number.

72427732 is a deficient number, since it is larger than the sum of its proper divisors (68780468).

72427732 is a wasteful number, since it uses less digits than its factorization.

72427732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48075 (or 48073 counting only the distinct ones).

The product of its digits is 32928, while the sum is 34.

The square root of 72427732 is about 8510.4484018176. The cubic root of 72427732 is about 416.8389519706.

The spelling of 72427732 in words is "seventy-two million, four hundred twenty-seven thousand, seven hundred thirty-two".