72399668 has 48 divisors (see below), whose sum is σ = 147547008. Its totient is φ = 30720000.

The previous prime is 72399641. The next prime is 72399697. The reversal of 72399668 is 86699327.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112628 + ... + 113268.

It is an arithmetic number, because the mean of its divisors is an integer number (3073896).

Almost surely, 2^72399668 is an apocalyptic number.

It is an amenable number.

72399668 is an abundant number, since it is smaller than the sum of its proper divisors (75147340).

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

72399668 is a wasteful number, since it uses less digits than its factorization.

72399668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824 (or 822 counting only the distinct ones).

The product of its digits is 979776, while the sum is 50.

The square root of 72399668 is about 8508.7994452802. The cubic root of 72399668 is about 416.7851066673.

The spelling of 72399668 in words is "seventy-two million, three hundred ninety-nine thousand, six hundred sixty-eight".