72717930 has 48 divisors (see below), whose sum is σ = 193100544. Its totient is φ = 18977760.

The previous prime is 72717919. The next prime is 72717937. The reversal of 72717930 is 3971727.

It is not an unprimeable number, because it can be changed into a prime (72717937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4366 + ... + 12825.

It is an arithmetic number, because the mean of its divisors is an integer number (4022928).

Almost surely, 2^72717930 is an apocalyptic number.

72717930 is an abundant number, since it is smaller than the sum of its proper divisors (120382614).

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

72717930 is a wasteful number, since it uses less digits than its factorization.

72717930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17251 (or 17248 counting only the distinct ones).

The product of its (nonzero) digits is 18522, while the sum is 36.

The square root of 72717930 is about 8527.4808706909. The cubic root of 72717930 is about 417.3949297551.

The spelling of 72717930 in words is "seventy-two million, seven hundred seventeen thousand, nine hundred thirty".