172566272 has 36 divisors (see below), whose sum is σ = 349634376. Its totient is φ = 84986880.

The previous prime is 172566197. The next prime is 172566311. The reversal of 172566272 is 272665271.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12122 + ... + 22182.

It is an arithmetic number, because the mean of its divisors is an integer number (9712066).

Almost surely, 2^172566272 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 172566272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174817188).

172566272 is an abundant number, since it is smaller than the sum of its proper divisors (177068104).

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

172566272 is an equidigital number, since it uses as much as digits as its factorization.

172566272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10144 (or 10130 counting only the distinct ones).

The product of its digits is 70560, while the sum is 38.

The square root of 172566272 is about 13136.4482262140. The cubic root of 172566272 is about 556.7394195772.

The spelling of 172566272 in words is "one hundred seventy-two million, five hundred sixty-six thousand, two hundred seventy-two".