171812868 has 12 divisors (see below), whose sum is σ = 400896720. Its totient is φ = 57270952.

The previous prime is 171812843. The next prime is 171812929. The reversal of 171812868 is 868218171.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×171812868² = 59039323220770848, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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, 7158858 + ... + 7158881.

It is an arithmetic number, because the mean of its divisors is an integer number (33408060).

Almost surely, 2^171812868 is an apocalyptic number.

It is an amenable number.

171812868 is an abundant number, since it is smaller than the sum of its proper divisors (229083852).

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

171812868 is a wasteful number, since it uses less digits than its factorization.

171812868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14317746 (or 14317744 counting only the distinct ones).

The product of its digits is 43008, while the sum is 42.

The square root of 171812868 is about 13107.7407664326. The cubic root of 171812868 is about 555.9280180436.

The spelling of 171812868 in words is "one hundred seventy-one million, eight hundred twelve thousand, eight hundred sixty-eight".