172409472 has 192 divisors, whose sum is σ = 539098560. Its totient is φ = 54743040.

The previous prime is 172409459. The next prime is 172409473. The reversal of 172409472 is 274904271.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172409473) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 715272 + ... + 715512.

It is an arithmetic number, because the mean of its divisors is an integer number (2807805).

Almost surely, 2^172409472 is an apocalyptic number.

172409472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172409472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269549280).

172409472 is an abundant number, since it is smaller than the sum of its proper divisors (366689088).

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

172409472 is an equidigital number, since it uses as much as digits as its factorization.

172409472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 172409472 is about 13130.4787422241. The cubic root of 172409472 is about 556.5707439071.

The spelling of 172409472 in words is "one hundred seventy-two million, four hundred nine thousand, four hundred seventy-two".