72988775 has 18 divisors (see below), whose sum is σ = 94629360. Its totient is φ = 55842160.

The previous prime is 72988763. The next prime is 72988777. The reversal of 72988775 is 57788927.

It is not a de Polignac number, because 72988775 - 2¹² = 72984679 is a prime.

It is a super-2 number, since 2×72988775² = 10654722552001250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72988777) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10466 + ... + 15984.

Almost surely, 2^72988775 is an apocalyptic number.

72988775 is a deficient number, since it is larger than the sum of its proper divisors (21640585).

72988775 is a wasteful number, since it uses less digits than its factorization.

72988775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5575 (or 5547 counting only the distinct ones).

The product of its digits is 1975680, while the sum is 53.

The square root of 72988775 is about 8543.3468266248. The cubic root of 72988775 is about 417.9124970412.

The spelling of 72988775 in words is "seventy-two million, nine hundred eighty-eight thousand, seven hundred seventy-five".