72772388 has 12 divisors (see below), whose sum is σ = 137148060. Its totient is φ = 33587232.

The previous prime is 72772369. The next prime is 72772409. The reversal of 72772388 is 88327727.

It can be written as a sum of positive squares in 2 ways, for example, as 2849344 + 69923044 = 1688^2 + 8362^2 .

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, 699683 + ... + 699786.

It is an arithmetic number, because the mean of its divisors is an integer number (11429005).

Almost surely, 2^72772388 is an apocalyptic number.

It is an amenable number.

72772388 is a deficient number, since it is larger than the sum of its proper divisors (64375672).

72772388 is a wasteful number, since it uses less digits than its factorization.

72772388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399486 (or 1399484 counting only the distinct ones).

The product of its digits is 263424, while the sum is 44.

The square root of 72772388 is about 8530.6733614645. The cubic root of 72772388 is about 417.4990985674.

The spelling of 72772388 in words is "seventy-two million, seven hundred seventy-two thousand, three hundred eighty-eight".