172324990 has 16 divisors (see below), whose sum is σ = 310515840. Its totient is φ = 68856480.

The previous prime is 172324987. The next prime is 172325011. The reversal of 172324990 is 99423271.

It is a congruent number.

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, 1216 + ... + 18604.

It is an arithmetic number, because the mean of its divisors is an integer number (19407240).

Almost surely, 2^172324990 is an apocalyptic number.

172324990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172324990 is a deficient number, since it is larger than the sum of its proper divisors (138190850).

172324990 is a wasteful number, since it uses less digits than its factorization.

172324990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18387.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 172324990 is about 13127.2613290054. The cubic root of 172324990 is about 556.4798210376.

It can be divided in two parts, 17232 and 4990, that added together give a palindrome (22222).

The spelling of 172324990 in words is "one hundred seventy-two million, three hundred twenty-four thousand, nine hundred ninety".