171868842 has 48 divisors (see below), whose sum is σ = 381279912. Its totient is φ = 55935360.

The previous prime is 171868817. The next prime is 171868859. The reversal of 171868842 is 248868171.

It can be written as a sum of positive squares in 4 ways, for example, as 117094041 + 54774801 = 10821^2 + 7401^2 .

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 171888 + ... + 172884.

Almost surely, 2^171868842 is an apocalyptic number.

171868842 is an abundant number, since it is smaller than the sum of its proper divisors (209411070).

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

171868842 is a wasteful number, since it uses less digits than its factorization.

171868842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223 (or 1220 counting only the distinct ones).

The product of its digits is 172032, while the sum is 45.

The square root of 171868842 is about 13109.8757431182. The cubic root of 171868842 is about 555.9883824324.

The spelling of 171868842 in words is "one hundred seventy-one million, eight hundred sixty-eight thousand, eight hundred forty-two".