72173964 has 12 divisors (see below), whose sum is σ = 168405944. Its totient is φ = 24057984.

The previous prime is 72173963. The next prime is 72173971. The reversal of 72173964 is 46937127.

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

It is not an unprimeable number, because it can be changed into a prime (72173963) by changing a digit.

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, 3007237 + ... + 3007260.

Almost surely, 2^72173964 is an apocalyptic number.

It is an amenable number.

72173964 is an abundant number, since it is smaller than the sum of its proper divisors (96231980).

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

72173964 is a wasteful number, since it uses less digits than its factorization.

72173964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6014504 (or 6014502 counting only the distinct ones).

The product of its digits is 63504, while the sum is 39.

The square root of 72173964 is about 8495.5261167276. The cubic root of 72173964 is about 416.3515504020.

It can be divided in two parts, 72173 and 964, that added together give a palindrome (73137).

The spelling of 72173964 in words is "seventy-two million, one hundred seventy-three thousand, nine hundred sixty-four".