72398579 has 16 divisors (see below), whose sum is σ = 81375840. Its totient is φ = 63840000.

The previous prime is 72398561. The next prime is 72398581. The reversal of 72398579 is 97589327.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72398579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72398539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102929 + ... + 103629.

It is an arithmetic number, because the mean of its divisors is an integer number (5085990).

Almost surely, 2^72398579 is an apocalyptic number.

72398579 is a deficient number, since it is larger than the sum of its proper divisors (8977261).

72398579 is a wasteful number, since it uses less digits than its factorization.

72398579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982.

The product of its digits is 952560, while the sum is 50.

The square root of 72398579 is about 8508.7354524630. The cubic root of 72398579 is about 416.7830169650.

The spelling of 72398579 in words is "seventy-two million, three hundred ninety-eight thousand, five hundred seventy-nine".