72640788 has 24 divisors (see below), whose sum is σ = 184904160. Its totient is φ = 22012320.

The previous prime is 72640783. The next prime is 72640801. The reversal of 72640788 is 88704627.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72640783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275023 + ... + 275286.

It is an arithmetic number, because the mean of its divisors is an integer number (7704340).

Almost surely, 2^72640788 is an apocalyptic number.

It is an amenable number.

72640788 is an abundant number, since it is smaller than the sum of its proper divisors (112263372).

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

72640788 is a wasteful number, since it uses less digits than its factorization.

72640788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550327 (or 550325 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 72640788 is about 8522.9565292802. The cubic root of 72640788 is about 417.2472812900.

It can be divided in two parts, 726 and 40788, that added together give a palindrome (41514).

The spelling of 72640788 in words is "seventy-two million, six hundred forty thousand, seven hundred eighty-eight".