72322528 has 24 divisors (see below), whose sum is σ = 145074888. Its totient is φ = 35478144.

The previous prime is 72322513. The next prime is 72322529. The reversal of 72322528 is 82522327.

It is a self number, because there is not a number n which added to its sum of digits gives 72322528.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72322529) 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, 19626 + ... + 23017.

It is an arithmetic number, because the mean of its divisors is an integer number (6044787).

Almost surely, 2^72322528 is an apocalyptic number.

It is an amenable number.

72322528 is an abundant number, since it is smaller than the sum of its proper divisors (72752360).

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

72322528 is a wasteful number, since it uses less digits than its factorization.

72322528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42706 (or 42698 counting only the distinct ones).

The product of its digits is 13440, while the sum is 31.

The square root of 72322528 is about 8504.2652827860. The cubic root of 72322528 is about 416.6370294297.

The spelling of 72322528 in words is "seventy-two million, three hundred twenty-two thousand, five hundred twenty-eight".