172422638 has 8 divisors (see below), whose sum is σ = 258728232. Its totient is φ = 86179896.

The previous prime is 172422629. The next prime is 172422673. The reversal of 172422638 is 836224271.

172422638 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 172422598 and 172422607.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8120 + ... + 20267.

It is an arithmetic number, because the mean of its divisors is an integer number (32341029).

Almost surely, 2^172422638 is an apocalyptic number.

172422638 is a deficient number, since it is larger than the sum of its proper divisors (86305594).

172422638 is a wasteful number, since it uses less digits than its factorization.

172422638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31426.

The product of its digits is 32256, while the sum is 35.

The square root of 172422638 is about 13130.9800852792. The cubic root of 172422638 is about 556.5849110017.

The spelling of 172422638 in words is "one hundred seventy-two million, four hundred twenty-two thousand, six hundred thirty-eight".