72317712 has 20 divisors (see below), whose sum is σ = 186820880. Its totient is φ = 24105888.

The previous prime is 72317683. The next prime is 72317719. The reversal of 72317712 is 21771327.

It is a self number, because there is not a number n which added to its sum of digits gives 72317712.

It is not an unprimeable number, because it can be changed into a prime (72317719) 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 3 ways as a sum of consecutive naturals, for example, 753262 + ... + 753357.

It is an arithmetic number, because the mean of its divisors is an integer number (9341044).

Almost surely, 2^72317712 is an apocalyptic number.

It is an amenable number.

72317712 is an abundant number, since it is smaller than the sum of its proper divisors (114503168).

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

72317712 is a wasteful number, since it uses less digits than its factorization.

72317712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506630 (or 1506624 counting only the distinct ones).

The product of its digits is 4116, while the sum is 30.

The square root of 72317712 is about 8503.9821260395. The cubic root of 72317712 is about 416.6277811889.

The spelling of 72317712 in words is "seventy-two million, three hundred seventeen thousand, seven hundred twelve".