871868 has 24 divisors (see below), whose sum is σ = 1615152. Its totient is φ = 411264.

The previous prime is 871867. The next prime is 871883. The reversal of 871868 is 868178.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6296 + ... + 6432.

It is an arithmetic number, because the mean of its divisors is an integer number (67298).

2⁸⁷¹⁸⁶⁸ is an apocalyptic number.

It is an amenable number.

871868 is a deficient number, since it is larger than the sum of its proper divisors (743284).

871868 is a wasteful number, since it uses less digits than its factorization.

871868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 219 counting only the distinct ones).

The product of its digits is 21504, while the sum is 38.

The square root of 871868 is about 933.7387214848. The cubic root of 871868 is about 95.5323026969.

The spelling of 871868 in words is "eight hundred seventy-one thousand, eight hundred sixty-eight".