172299144 has 64 divisors (see below), whose sum is σ = 455083200. Its totient is φ = 54210816.

The previous prime is 172299137. The next prime is 172299157. The reversal of 172299144 is 441992271.

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, 169582 + ... + 170594.

It is an arithmetic number, because the mean of its divisors is an integer number (7110675).

Almost surely, 2^172299144 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 172299144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227541600).

172299144 is an abundant number, since it is smaller than the sum of its proper divisors (282784056).

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

172299144 is a wasteful number, since it uses less digits than its factorization.

172299144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414 (or 1410 counting only the distinct ones).

The product of its digits is 36288, while the sum is 39.

The square root of 172299144 is about 13126.2768521771. The cubic root of 172299144 is about 556.4519986141.

The spelling of 172299144 in words is "one hundred seventy-two million, two hundred ninety-nine thousand, one hundred forty-four".