172392288 has 48 divisors (see below), whose sum is σ = 457637040. Its totient is φ = 56815616.

The previous prime is 172392281. The next prime is 172392293. The reversal of 172392288 is 882293271.

It is a happy number.

172392288 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172392281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1545 + ... + 18632.

It is an arithmetic number, because the mean of its divisors is an integer number (9534105).

Almost surely, 2^172392288 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 172392288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228818520).

172392288 is an abundant number, since it is smaller than the sum of its proper divisors (285244752).

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

172392288 is a wasteful number, since it uses less digits than its factorization.

172392288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20279 (or 20271 counting only the distinct ones).

The product of its digits is 96768, while the sum is 42.

The square root of 172392288 is about 13129.8243704933. The cubic root of 172392288 is about 556.5522522134.

The spelling of 172392288 in words is "one hundred seventy-two million, three hundred ninety-two thousand, two hundred eighty-eight".