72539938 has 16 divisors (see below), whose sum is σ = 112985856. Its totient is φ = 34891920.

The previous prime is 72539923. The next prime is 72539959. The reversal of 72539938 is 83993527.

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 7 ways as a sum of consecutive naturals, for example, 7345 + ... + 14107.

It is an arithmetic number, because the mean of its divisors is an integer number (7061616).

Almost surely, 2^72539938 is an apocalyptic number.

72539938 is a deficient number, since it is larger than the sum of its proper divisors (40445918).

72539938 is a wasteful number, since it uses less digits than its factorization.

72539938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6969.

The product of its digits is 408240, while the sum is 46.

The square root of 72539938 is about 8517.0381001848. The cubic root of 72539938 is about 417.0540983781.

The spelling of 72539938 in words is "seventy-two million, five hundred thirty-nine thousand, nine hundred thirty-eight".