172224792 has 56 divisors (see below), whose sum is σ = 484177140. Its totient is φ = 57406320.

The previous prime is 172224791. The next prime is 172224799. The reversal of 172224792 is 297422271.

It is a super-2 number, since 2×172224792² = 59322757958886528, which contains 22 as substring.

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 (172224791) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 8934 + ... + 20597.

Almost surely, 2^172224792 is an apocalyptic number.

172224792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

172224792 is an abundant number, since it is smaller than the sum of its proper divisors (311952348).

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

172224792 is an equidigital number, since it uses as much as digits as its factorization.

172224792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29555 (or 29536 counting only the distinct ones).

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

The square root of 172224792 is about 13123.4443649524. Note that the first 3 decimals coincide. The cubic root of 172224792 is about 556.3719454563.

The spelling of 172224792 in words is "one hundred seventy-two million, two hundred twenty-four thousand, seven hundred ninety-two".