72913472 has 14 divisors (see below), whose sum is σ = 144687798. Its totient is φ = 36456704.

The previous prime is 72913433. The next prime is 72913481. The reversal of 72913472 is 27431927.

It can be written as a sum of positive squares in only one way, i.e., 72863296 + 50176 = 8536^2 + 224^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569573 + ... + 569700.

Almost surely, 2^72913472 is an apocalyptic number.

It is an amenable number.

72913472 is a deficient number, since it is larger than the sum of its proper divisors (71774326).

72913472 is a wasteful number, since it uses less digits than its factorization.

72913472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139285 (or 1139275 counting only the distinct ones).

The product of its digits is 21168, while the sum is 35.

The square root of 72913472 is about 8538.9385757247. The cubic root of 72913472 is about 417.7687265614.

The spelling of 72913472 in words is "seventy-two million, nine hundred thirteen thousand, four hundred seventy-two".