172328685 has 16 divisors (see below), whose sum is σ = 275922240. Its totient is φ = 91843200.

The previous prime is 172328641. The next prime is 172328687. The reversal of 172328685 is 586823271.

172328685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 172328685 - 2⁶ = 172328621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172328687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23826 + ... + 30204.

It is an arithmetic number, because the mean of its divisors is an integer number (17245140).

Almost surely, 2^172328685 is an apocalyptic number.

172328685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172328685 is a deficient number, since it is larger than the sum of its proper divisors (103593555).

172328685 is a wasteful number, since it uses less digits than its factorization.

172328685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8188.

The product of its digits is 161280, while the sum is 42.

The square root of 172328685 is about 13127.4020659078. The cubic root of 172328685 is about 556.4837983641.

The spelling of 172328685 in words is "one hundred seventy-two million, three hundred twenty-eight thousand, six hundred eighty-five".