72311808 has 44 divisors (see below), whose sum is σ = 192745520. Its totient is φ = 24102912.

The previous prime is 72311807. The next prime is 72311849. The reversal of 72311808 is 80811327.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (72311807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8698 + ... + 14841.

It is an arithmetic number, because the mean of its divisors is an integer number (4380580).

Almost surely, 2^72311808 is an apocalyptic number.

It is an amenable number.

72311808 is an abundant number, since it is smaller than the sum of its proper divisors (120433712).

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

72311808 is a wasteful number, since it uses less digits than its factorization.

72311808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23562 (or 23544 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 72311808 is about 8503.6349874627. The cubic root of 72311808 is about 416.6164430842.

The spelling of 72311808 in words is "seventy-two million, three hundred eleven thousand, eight hundred eight".