172204164 has 96 divisors (see below), whose sum is σ = 498516480. Its totient is φ = 50954400.

The previous prime is 172204157. The next prime is 172204171. The reversal of 172204164 is 461402271.

It is an interprime number because it is at equal distance from previous prime (172204157) and next prime (172204171).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49399 + ... + 52769.

It is an arithmetic number, because the mean of its divisors is an integer number (5192880).

Almost surely, 2^172204164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172204164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249258240).

172204164 is an abundant number, since it is smaller than the sum of its proper divisors (326312316).

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

172204164 is a wasteful number, since it uses less digits than its factorization.

172204164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3438 (or 3430 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 172204164 is about 13122.6584196953. The cubic root of 172204164 is about 556.3497316612.

The spelling of 172204164 in words is "one hundred seventy-two million, two hundred four thousand, one hundred sixty-four".