172208120 has 64 divisors (see below), whose sum is σ = 453150720. Its totient is φ = 57665664.

The previous prime is 172208089. The next prime is 172208137. The reversal of 172208120 is 21802271.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4889 + ... + 19191.

It is an arithmetic number, because the mean of its divisors is an integer number (7080480).

Almost surely, 2^172208120 is an apocalyptic number.

172208120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172208120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226575360).

172208120 is an abundant number, since it is smaller than the sum of its proper divisors (280942600).

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

172208120 is a wasteful number, since it uses less digits than its factorization.

172208120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14364 (or 14360 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 172208120 is about 13122.8091504830. The cubic root of 172208120 is about 556.3539919195.

The spelling of 172208120 in words is "one hundred seventy-two million, two hundred eight thousand, one hundred twenty".