72318992 has 20 divisors (see below), whose sum is σ = 146210880. Its totient is φ = 34587168.

The previous prime is 72318989. The next prime is 72319021. The reversal of 72318992 is 29981327.

It is a happy number.

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, 97892 + ... + 98627.

It is an arithmetic number, because the mean of its divisors is an integer number (7310544).

Almost surely, 2^72318992 is an apocalyptic number.

It is an amenable number.

72318992 is an abundant number, since it is smaller than the sum of its proper divisors (73891888).

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

72318992 is a wasteful number, since it uses less digits than its factorization.

72318992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196550 (or 196544 counting only the distinct ones).

The product of its digits is 54432, while the sum is 41.

The square root of 72318992 is about 8504.0573845665. The cubic root of 72318992 is about 416.6302392332.

The spelling of 72318992 in words is "seventy-two million, three hundred eighteen thousand, nine hundred ninety-two".