172220680 has 32 divisors (see below), whose sum is σ = 388411200. Its totient is φ = 68725696.

The previous prime is 172220669. The next prime is 172220707. The reversal of 172220680 is 86022271.

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, 12861 + ... + 22579.

It is an arithmetic number, because the mean of its divisors is an integer number (12137850).

Almost surely, 2^172220680 is an apocalyptic number.

172220680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172220680 is an abundant number, since it is smaller than the sum of its proper divisors (216190520).

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

172220680 is a wasteful number, since it uses less digits than its factorization.

172220680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10173 (or 10169 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 172220680 is about 13123.2876978294. The cubic root of 172220680 is about 556.3675174843.

The spelling of 172220680 in words is "one hundred seventy-two million, two hundred twenty thousand, six hundred eighty".