72165188 has 12 divisors (see below), whose sum is σ = 126429072. Its totient is φ = 36042600.

The previous prime is 72165131. The next prime is 72165229. The reversal of 72165188 is 88156127.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5738 + ... + 13313.

It is an arithmetic number, because the mean of its divisors is an integer number (10535756).

Almost surely, 2^72165188 is an apocalyptic number.

It is an amenable number.

72165188 is a deficient number, since it is larger than the sum of its proper divisors (54263884).

72165188 is a wasteful number, since it uses less digits than its factorization.

72165188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20002 (or 20000 counting only the distinct ones).

The product of its digits is 26880, while the sum is 38.

The square root of 72165188 is about 8495.0095938733. The cubic root of 72165188 is about 416.3346742826.

The spelling of 72165188 in words is "seventy-two million, one hundred sixty-five thousand, one hundred eighty-eight".