172399344 has 80 divisors (see below), whose sum is σ = 482698272. Its totient is φ = 52706304.

The previous prime is 172399343. The next prime is 172399349. The reversal of 172399344 is 443993271.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 172399296 and 172399305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172399343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107154 + ... + 108750.

Almost surely, 2^172399344 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 172399344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241349136).

172399344 is an abundant number, since it is smaller than the sum of its proper divisors (310298928).

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

172399344 is a wasteful number, since it uses less digits than its factorization.

172399344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1794 (or 1788 counting only the distinct ones).

The product of its digits is 163296, while the sum is 42.

The square root of 172399344 is about 13130.0930689771. The cubic root of 172399344 is about 556.5598453201.

The spelling of 172399344 in words is "one hundred seventy-two million, three hundred ninety-nine thousand, three hundred forty-four".