856986 has 16 divisors (see below), whose sum is σ = 1845984. Its totient is φ = 263664.

The previous prime is 856969. The next prime is 856993. The reversal of 856986 is 689658.

856986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5416 + ... + 5571.

It is an arithmetic number, because the mean of its divisors is an integer number (115374).

2⁸⁵⁶⁹⁸⁶ is an apocalyptic number.

856986 is an abundant number, since it is smaller than the sum of its proper divisors (988998).

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

856986 is a wasteful number, since it uses less digits than its factorization.

856986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11005.

The product of its digits is 103680, while the sum is 42.

The square root of 856986 is about 925.7353833575. The cubic root of 856986 is about 94.9856303289.

The spelling of 856986 in words is "eight hundred fifty-six thousand, nine hundred eighty-six".