72173164 has 24 divisors (see below), whose sum is σ = 144875808. Its totient is φ = 30817920.

The previous prime is 72173147. The next prime is 72173173. The reversal of 72173164 is 46137127.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3282 + ... + 12454.

It is an arithmetic number, because the mean of its divisors is an integer number (6036492).

Almost surely, 2^72173164 is an apocalyptic number.

It is an amenable number.

72173164 is an abundant number, since it is smaller than the sum of its proper divisors (72702644).

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

72173164 is a wasteful number, since it uses less digits than its factorization.

72173164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9465 (or 9463 counting only the distinct ones).

The product of its digits is 7056, while the sum is 31.

The square root of 72173164 is about 8495.4790329916. The cubic root of 72173164 is about 416.3500120704.

The spelling of 72173164 in words is "seventy-two million, one hundred seventy-three thousand, one hundred sixty-four".