172722272 has 48 divisors (see below), whose sum is σ = 358253280. Its totient is φ = 81810432.

The previous prime is 172722269. The next prime is 172722281. The reversal of 172722272 is 272227271.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

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, 79148 + ... + 81300.

It is an arithmetic number, because the mean of its divisors is an integer number (7463610).

Almost surely, 2^172722272 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 172722272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179126640).

172722272 is an abundant number, since it is smaller than the sum of its proper divisors (185531008).

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

172722272 is a wasteful number, since it uses less digits than its factorization.

172722272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2295 (or 2287 counting only the distinct ones).

The product of its digits is 10976, while the sum is 32.

The square root of 172722272 is about 13142.3845629323. The cubic root of 172722272 is about 556.9071332916.

The spelling of 172722272 in words is "one hundred seventy-two million, seven hundred twenty-two thousand, two hundred seventy-two".