72318657 has 8 divisors (see below), whose sum is σ = 96464800. Its totient is φ = 48192480.

The previous prime is 72318643. The next prime is 72318679. The reversal of 72318657 is 75681327.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72318657 - 2⁶ = 72318593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72318457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9357 + ... + 15237.

It is an arithmetic number, because the mean of its divisors is an integer number (12058100).

Almost surely, 2^72318657 is an apocalyptic number.

It is an amenable number.

72318657 is a deficient number, since it is larger than the sum of its proper divisors (24146143).

72318657 is a wasteful number, since it uses less digits than its factorization.

72318657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9983.

The product of its digits is 70560, while the sum is 39.

The square root of 72318657 is about 8504.0376880632. The cubic root of 72318657 is about 416.6295959197.

The spelling of 72318657 in words is "seventy-two million, three hundred eighteen thousand, six hundred fifty-seven".