72811732 has 24 divisors (see below), whose sum is σ = 145893440. Its totient is φ = 31147200.

The previous prime is 72811729. The next prime is 72811763. The reversal of 72811732 is 23711827.

It is a junction number, because it is equal to n+sod(n) for n = 72811694 and 72811703.

It is a congruent number.

It is an unprimeable number.

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, 15232 + ... + 19432.

Almost surely, 2^72811732 is an apocalyptic number.

It is an amenable number.

72811732 is an abundant number, since it is smaller than the sum of its proper divisors (73081708).

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

72811732 is a wasteful number, since it uses less digits than its factorization.

72811732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4831 (or 4829 counting only the distinct ones).

The product of its digits is 4704, while the sum is 31.

The square root of 72811732 is about 8532.9790811885. The cubic root of 72811732 is about 417.5743245592.

The spelling of 72811732 in words is "seventy-two million, eight hundred eleven thousand, seven hundred thirty-two".