72193388 has 24 divisors (see below), whose sum is σ = 136086720. Its totient is φ = 33400080.

The previous prime is 72193379. The next prime is 72193393. The reversal of 72193388 is 88339127.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7778 + ... + 14313.

It is an arithmetic number, because the mean of its divisors is an integer number (5670280).

Almost surely, 2^72193388 is an apocalyptic number.

It is an amenable number.

72193388 is a deficient number, since it is larger than the sum of its proper divisors (63893332).

72193388 is a wasteful number, since it uses less digits than its factorization.

72193388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22157 (or 22155 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 72193388 is about 8496.6692297629. The cubic root of 72193388 is about 416.3888976054.

The spelling of 72193388 in words is "seventy-two million, one hundred ninety-three thousand, three hundred eighty-eight".