871856 has 20 divisors (see below), whose sum is σ = 1748400. Its totient is φ = 420672.

The previous prime is 871837. The next prime is 871867. The reversal of 871856 is 658178.

It is a happy number.

871856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476 + ... + 1403.

It is an arithmetic number, because the mean of its divisors is an integer number (87420).

2⁸⁷¹⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

871856 is an abundant number, since it is smaller than the sum of its proper divisors (876544).

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

871856 is a wasteful number, since it uses less digits than its factorization.

871856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916 (or 1910 counting only the distinct ones).

The product of its digits is 13440, while the sum is 35.

The square root of 871856 is about 933.7322956822. The cubic root of 871856 is about 95.5318644070.

The spelling of 871856 in words is "eight hundred seventy-one thousand, eight hundred fifty-six".