856806 has 16 divisors (see below), whose sum is σ = 1742448. Its totient is φ = 280800.

The previous prime is 856799. The next prime is 856811. The reversal of 856806 is 608658.

856806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 805 + ... + 1536.

It is an arithmetic number, because the mean of its divisors is an integer number (108903).

2⁸⁵⁶⁸⁰⁶ is an apocalyptic number.

856806 is an abundant number, since it is smaller than the sum of its proper divisors (885642).

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

856806 is a wasteful number, since it uses less digits than its factorization.

856806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 856806 is about 925.6381582454. The cubic root of 856806 is about 94.9789796521.

The spelling of 856806 in words is "eight hundred fifty-six thousand, eight hundred six".