72813572 has 12 divisors (see below), whose sum is σ = 137225676. Its totient is φ = 33606240.

The previous prime is 72813547. The next prime is 72813619. The reversal of 72813572 is 27531827.

It can be written as a sum of positive squares in 2 ways, for example, as 4519876 + 68293696 = 2126^2 + 8264^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 700079 + ... + 700182.

It is an arithmetic number, because the mean of its divisors is an integer number (11435473).

Almost surely, 2^72813572 is an apocalyptic number.

It is an amenable number.

72813572 is a deficient number, since it is larger than the sum of its proper divisors (64412104).

72813572 is a wasteful number, since it uses less digits than its factorization.

72813572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400278 (or 1400276 counting only the distinct ones).

The product of its digits is 23520, while the sum is 35.

The square root of 72813572 is about 8533.0868974832. The cubic root of 72813572 is about 417.5778419882.

The spelling of 72813572 in words is "seventy-two million, eight hundred thirteen thousand, five hundred seventy-two".