72656988 has 24 divisors (see below), whose sum is σ = 178456320. Its totient is φ = 22944240.

The previous prime is 72656869. The next prime is 72656989. The reversal of 72656988 is 88965627.

It is a self number, because there is not a number n which added to its sum of digits gives 72656988.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72656989) 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, 159108 + ... + 159563.

It is an arithmetic number, because the mean of its divisors is an integer number (7435680).

Almost surely, 2^72656988 is an apocalyptic number.

It is an amenable number.

72656988 is an abundant number, since it is smaller than the sum of its proper divisors (105799332).

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

72656988 is a wasteful number, since it uses less digits than its factorization.

72656988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318697 (or 318695 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 51.

The square root of 72656988 is about 8523.9068507346. The cubic root of 72656988 is about 417.2782964800.

The spelling of 72656988 in words is "seventy-two million, six hundred fifty-six thousand, nine hundred eighty-eight".