72738472 has 16 divisors (see below), whose sum is σ = 138958740. Its totient is φ = 35682816.

The previous prime is 72738451. The next prime is 72738481. The reversal of 72738472 is 27483727.

It can be written as a sum of positive squares in 2 ways, for example, as 72692676 + 45796 = 8526^2 + 214^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85353 + ... + 86200.

Almost surely, 2^72738472 is an apocalyptic number.

It is an amenable number.

72738472 is a deficient number, since it is larger than the sum of its proper divisors (66220268).

72738472 is a wasteful number, since it uses less digits than its factorization.

72738472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171612 (or 171608 counting only the distinct ones).

The product of its digits is 131712, while the sum is 40.

The square root of 72738472 is about 8528.6852445145. The cubic root of 72738472 is about 417.4342291842.

The spelling of 72738472 in words is "seventy-two million, seven hundred thirty-eight thousand, four hundred seventy-two".