172400944 has 40 divisors (see below), whose sum is σ = 360378720. Its totient is φ = 79592448.

The previous prime is 172400929. The next prime is 172400953. The reversal of 172400944 is 449004271.

It is a super-2 number, since 2×172400944² = 59444170984182272, which contains 22 as substring.

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, 8437 + ... + 20395.

It is an arithmetic number, because the mean of its divisors is an integer number (9009468).

Almost surely, 2^172400944 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 172400944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180189360).

172400944 is an abundant number, since it is smaller than the sum of its proper divisors (187977776).

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

172400944 is a wasteful number, since it uses less digits than its factorization.

172400944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12037 (or 12031 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 172400944 is about 13130.1539975737. The cubic root of 172400944 is about 556.5615670842.

The spelling of 172400944 in words is "one hundred seventy-two million, four hundred thousand, nine hundred forty-four".