72228612 has 24 divisors (see below), whose sum is σ = 171714816. Its totient is φ = 23621728.

The previous prime is 72228601. The next prime is 72228617. The reversal of 72228612 is 21682227.

It is a self number, because there is not a number n which added to its sum of digits gives 72228612.

It is not an unprimeable number, because it can be changed into a prime (72228617) 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, 56148 + ... + 57419.

It is an arithmetic number, because the mean of its divisors is an integer number (7154784).

Almost surely, 2^72228612 is an apocalyptic number.

It is an amenable number.

72228612 is an abundant number, since it is smaller than the sum of its proper divisors (99486204).

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

72228612 is a wasteful number, since it uses less digits than its factorization.

72228612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113627 (or 113625 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 72228612 is about 8498.7417892297. The cubic root of 72228612 is about 416.4566069354.

The spelling of 72228612 in words is "seventy-two million, two hundred twenty-eight thousand, six hundred twelve".