72688844 has 12 divisors (see below), whose sum is σ = 127281000. Its totient is φ = 36322848.

The previous prime is 72688843. The next prime is 72688849. The reversal of 72688844 is 44888627.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (72688841) 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 3 ways as a sum of consecutive naturals, for example, 4007 + ... + 12705.

It is an arithmetic number, because the mean of its divisors is an integer number (10606750).

Almost surely, 2^72688844 is an apocalyptic number.

It is an amenable number.

72688844 is a deficient number, since it is larger than the sum of its proper divisors (54592156).

72688844 is a wasteful number, since it uses less digits than its factorization.

72688844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10792 (or 10790 counting only the distinct ones).

The product of its digits is 688128, while the sum is 47.

The square root of 72688844 is about 8525.7752726658. The cubic root of 72688844 is about 417.3392719188.

The spelling of 72688844 in words is "seventy-two million, six hundred eighty-eight thousand, eight hundred forty-four".