72118808 has 32 divisors (see below), whose sum is σ = 137237760. Its totient is φ = 35527200.

The previous prime is 72118807. The next prime is 72118841. The reversal of 72118808 is 80881127.

It is a super-2 number, since 2×72118808² = 10402244934681728, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72118801) 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, 274085 + ... + 274347.

It is an arithmetic number, because the mean of its divisors is an integer number (4288680).

Almost surely, 2^72118808 is an apocalyptic number.

It is an amenable number.

72118808 is a deficient number, since it is larger than the sum of its proper divisors (65118952).

72118808 is a wasteful number, since it uses less digits than its factorization.

72118808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647 (or 643 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 35.

The square root of 72118808 is about 8492.2793171209. The cubic root of 72118808 is about 416.2454634922.

The spelling of 72118808 in words is "seventy-two million, one hundred eighteen thousand, eight hundred eight".