72318386 has 16 divisors (see below), whose sum is σ = 124419264. Its totient is φ = 30882384.

The previous prime is 72318377. The next prime is 72318397. The reversal of 72318386 is 68381327.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5165 + ... + 13088.

It is an arithmetic number, because the mean of its divisors is an integer number (7776204).

Almost surely, 2^72318386 is an apocalyptic number.

72318386 is a deficient number, since it is larger than the sum of its proper divisors (52100878).

72318386 is a wasteful number, since it uses less digits than its factorization.

72318386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18545.

The product of its digits is 48384, while the sum is 38.

The square root of 72318386 is about 8504.0217544407. The cubic root of 72318386 is about 416.6290755065.

The spelling of 72318386 in words is "seventy-two million, three hundred eighteen thousand, three hundred eighty-six".