72318016 has 21 divisors (see below), whose sum is σ = 143641191. Its totient is φ = 36124992.

The previous prime is 72318013. The next prime is 72318019. The reversal of 72318016 is 61081327.

The square root of 72318016 is 8504.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (72318013) and next prime (72318019).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72318013) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 67501 + ... + 68563.

Almost surely, 2^72318016 is an apocalyptic number.

72318016 is the 8504-th square number.

It is an amenable number.

72318016 is a deficient number, since it is larger than the sum of its proper divisors (71323175).

72318016 is an frugal number, since it uses more digits than its factorization.

72318016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2138 (or 1065 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The cubic root of 72318016 is about 416.6283649770.

The spelling of 72318016 in words is "seventy-two million, three hundred eighteen thousand, sixteen".