72115188 has 12 divisors (see below), whose sum is σ = 168268800. Its totient is φ = 24038392.

The previous prime is 72115181. The next prime is 72115193. The reversal of 72115188 is 88151127.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72115181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3004788 + ... + 3004811.

It is an arithmetic number, because the mean of its divisors is an integer number (14022400).

Almost surely, 2^72115188 is an apocalyptic number.

It is an amenable number.

72115188 is an abundant number, since it is smaller than the sum of its proper divisors (96153612).

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

72115188 is a wasteful number, since it uses less digits than its factorization.

72115188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6009606 (or 6009604 counting only the distinct ones).

The product of its digits is 4480, while the sum is 33.

The square root of 72115188 is about 8492.0661796762. The cubic root of 72115188 is about 416.2384989022.

The spelling of 72115188 in words is "seventy-two million, one hundred fifteen thousand, one hundred eighty-eight".