72213628 has 24 divisors (see below), whose sum is σ = 129999744. Its totient is φ = 35078400.

The previous prime is 72213599. The next prime is 72213649. The reversal of 72213628 is 82631227.

It is a self number, because there is not a number n which added to its sum of digits gives 72213628.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45301 + ... + 46867.

It is an arithmetic number, because the mean of its divisors is an integer number (5416656).

Almost surely, 2^72213628 is an apocalyptic number.

It is an amenable number.

72213628 is a deficient number, since it is larger than the sum of its proper divisors (57786116).

72213628 is a wasteful number, since it uses less digits than its factorization.

72213628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1893 (or 1891 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 72213628 is about 8497.8602012507. The cubic root of 72213628 is about 416.4278066341.

The spelling of 72213628 in words is "seventy-two million, two hundred thirteen thousand, six hundred twenty-eight".