72704924 has 12 divisors (see below), whose sum is σ = 129319848. Its totient is φ = 35756400.

The previous prime is 72704921. The next prime is 72704927. The reversal of 72704924 is 42940727.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72704921) and next prime (72704927).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72704921) by changing a digit.

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, 148742 + ... + 149229.

It is an arithmetic number, because the mean of its divisors is an integer number (10776654).

Almost surely, 2^72704924 is an apocalyptic number.

It is an amenable number.

72704924 is a deficient number, since it is larger than the sum of its proper divisors (56614924).

72704924 is a wasteful number, since it uses less digits than its factorization.

72704924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298036 (or 298034 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 72704924 is about 8526.7182432633. The cubic root of 72704924 is about 417.3700438150.

The spelling of 72704924 in words is "seventy-two million, seven hundred four thousand, nine hundred twenty-four".