172172346 has 8 divisors (see below), whose sum is σ = 344344704. Its totient is φ = 57390780.

The previous prime is 172172339. The next prime is 172172347. The reversal of 172172346 is 643271271.

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

172172346 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (172172347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14347690 + ... + 14347701.

It is an arithmetic number, because the mean of its divisors is an integer number (43043088).

Almost surely, 2^172172346 is an apocalyptic number.

172172346 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

172172346 is a wasteful number, since it uses less digits than its factorization.

172172346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28695396.

The product of its digits is 14112, while the sum is 33.

The square root of 172172346 is about 13121.4460331169. The cubic root of 172172346 is about 556.3154641465.

The spelling of 172172346 in words is "one hundred seventy-two million, one hundred seventy-two thousand, three hundred forty-six".