172442090 has 8 divisors (see below), whose sum is σ = 310395780. Its totient is φ = 68976832.

The previous prime is 172442077. The next prime is 172442093. The reversal of 172442090 is 90244271.

It can be written as a sum of positive squares in 2 ways, for example, as 167676601 + 4765489 = 12949^2 + 2183^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (172442093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8622095 + ... + 8622114.

Almost surely, 2^172442090 is an apocalyptic number.

172442090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172442090 is a deficient number, since it is larger than the sum of its proper divisors (137953690).

172442090 is a wasteful number, since it uses less digits than its factorization.

172442090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17244216.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 172442090 is about 13131.7207554836. The cubic root of 172442090 is about 556.6058407410.

The spelling of 172442090 in words is "one hundred seventy-two million, four hundred forty-two thousand, ninety".