72990924 has 24 divisors (see below), whose sum is σ = 170574768. Its totient is φ = 24292800.

The previous prime is 72990923. The next prime is 72990943. The reversal of 72990924 is 42909927.

It is not an unprimeable number, because it can be changed into a prime (72990923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4074 + ... + 12750.

It is an arithmetic number, because the mean of its divisors is an integer number (7107282).

Almost surely, 2^72990924 is an apocalyptic number.

It is an amenable number.

72990924 is an abundant number, since it is smaller than the sum of its proper divisors (97583844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72990924 is a wasteful number, since it uses less digits than its factorization.

72990924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9385 (or 9383 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 72990924 is about 8543.4725960818. The cubic root of 72990924 is about 417.9165985173.

The spelling of 72990924 in words is "seventy-two million, nine hundred ninety thousand, nine hundred twenty-four".