72997888 has 22 divisors (see below), whose sum is σ = 145926536. Its totient is φ = 36498432.

The previous prime is 72997877. The next prime is 72997933. The reversal of 72997888 is 88879927.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34620 + ... + 36667.

Almost surely, 2^72997888 is an apocalyptic number.

It is an amenable number.

72997888 is a deficient number, since it is larger than the sum of its proper divisors (72928648).

72997888 is an equidigital number, since it uses as much as digits as its factorization.

72997888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71307 (or 71289 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 58.

The square root of 72997888 is about 8543.8801489721. The cubic root of 72997888 is about 417.9298891132.

The spelling of 72997888 in words is "seventy-two million, nine hundred ninety-seven thousand, eight hundred eighty-eight".