72193888 has 24 divisors (see below), whose sum is σ = 153065808. Its totient is φ = 33320064.

The previous prime is 72193879. The next prime is 72193909. The reversal of 72193888 is 88839127.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86356 + ... + 87187.

It is an arithmetic number, because the mean of its divisors is an integer number (6377742).

Almost surely, 2^72193888 is an apocalyptic number.

It is an amenable number.

72193888 is an abundant number, since it is smaller than the sum of its proper divisors (80871920).

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

72193888 is a wasteful number, since it uses less digits than its factorization.

72193888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173566 (or 173558 counting only the distinct ones).

The product of its digits is 193536, while the sum is 46.

The square root of 72193888 is about 8496.6986530064. The cubic root of 72193888 is about 416.3898588844.

The spelling of 72193888 in words is "seventy-two million, one hundred ninety-three thousand, eight hundred eighty-eight".