172232406 has 40 divisors (see below), whose sum is σ = 408636360. Its totient is φ = 54032832.

The previous prime is 172232383. The next prime is 172232449. The reversal of 172232406 is 604232271.

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

It is a self number, because there is not a number n which added to its sum of digits gives 172232406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 28516 + ... + 34023.

It is an arithmetic number, because the mean of its divisors is an integer number (10215909).

Almost surely, 2^172232406 is an apocalyptic number.

172232406 is an abundant number, since it is smaller than the sum of its proper divisors (236403954).

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

172232406 is a wasteful number, since it uses less digits than its factorization.

172232406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62570 (or 62561 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 172232406 is about 13123.7344532721. The cubic root of 172232406 is about 556.3801443408.

Adding to 172232406 its reverse (604232271), we get a palindrome (776464677).

The spelling of 172232406 in words is "one hundred seventy-two million, two hundred thirty-two thousand, four hundred six".