72923632 has 20 divisors (see below), whose sum is σ = 146162520. Its totient is φ = 35204288.

The previous prime is 72923629. The next prime is 72923647. The reversal of 72923632 is 23632927.

It is a super-2 number, since 2×72923632² = 10635712208142848, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

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, 78118 + ... + 79045.

It is an arithmetic number, because the mean of its divisors is an integer number (7308126).

Almost surely, 2^72923632 is an apocalyptic number.

It is an amenable number.

72923632 is an abundant number, since it is smaller than the sum of its proper divisors (73238888).

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

72923632 is a wasteful number, since it uses less digits than its factorization.

72923632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157200 (or 157194 counting only the distinct ones).

The product of its digits is 27216, while the sum is 34.

The square root of 72923632 is about 8539.5334767187. The cubic root of 72923632 is about 417.7881300773.

The spelling of 72923632 in words is "seventy-two million, nine hundred twenty-three thousand, six hundred thirty-two".