171868128 has 24 divisors (see below), whose sum is σ = 451154088. Its totient is φ = 57289344.

The previous prime is 171868127. The next prime is 171868223. The reversal of 171868128 is 821868171.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 171868128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171868127) by changing a digit.

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, 895051 + ... + 895242.

It is an arithmetic number, because the mean of its divisors is an integer number (18798087).

Almost surely, 2^171868128 is an apocalyptic number.

It is an amenable number.

171868128 is an abundant number, since it is smaller than the sum of its proper divisors (279285960).

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

171868128 is a wasteful number, since it uses less digits than its factorization.

171868128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1790306 (or 1790298 counting only the distinct ones).

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

The square root of 171868128 is about 13109.8485117106. The cubic root of 171868128 is about 555.9876125115.

The spelling of 171868128 in words is "one hundred seventy-one million, eight hundred sixty-eight thousand, one hundred twenty-eight".