172090224 has 40 divisors (see below), whose sum is σ = 493963920. Its totient is φ = 57363264.

The previous prime is 172090213. The next prime is 172090229. The reversal of 172090224 is 422090271.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172090229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198747 + ... + 199610.

It is an arithmetic number, because the mean of its divisors is an integer number (12349098).

Almost surely, 2^172090224 is an apocalyptic number.

It is an amenable number.

172090224 is an abundant number, since it is smaller than the sum of its proper divisors (321873696).

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

172090224 is a wasteful number, since it uses less digits than its factorization.

172090224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398374 (or 398362 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 172090224 is about 13118.3163553865. The cubic root of 172090224 is about 556.2270004546.

The spelling of 172090224 in words is "one hundred seventy-two million, ninety thousand, two hundred twenty-four".