72418188 has 12 divisors (see below), whose sum is σ = 168975800. Its totient is φ = 24139392.

The previous prime is 72418187. The next prime is 72418219. The reversal of 72418188 is 88181427.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (72418187) 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, 3017413 + ... + 3017436.

Almost surely, 2^72418188 is an apocalyptic number.

It is an amenable number.

72418188 is an abundant number, since it is smaller than the sum of its proper divisors (96557612).

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

72418188 is a wasteful number, since it uses less digits than its factorization.

72418188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6034856 (or 6034854 counting only the distinct ones).

The product of its digits is 28672, while the sum is 39.

The square root of 72418188 is about 8509.8876608331. The cubic root of 72418188 is about 416.8206418307.

The spelling of 72418188 in words is "seventy-two million, four hundred eighteen thousand, one hundred eighty-eight".