867856 has 20 divisors (see below), whose sum is σ = 1834704. Its totient is φ = 394400.

The previous prime is 867829. The next prime is 867857. The reversal of 867856 is 658768.

867856 is nontrivially palindromic in base 15.

It is not an unprimeable number, because it can be changed into a prime (867857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2290 + ... + 2641.

2⁸⁶⁷⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

867856 is an abundant number, since it is smaller than the sum of its proper divisors (966848).

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

867856 is a wasteful number, since it uses less digits than its factorization.

867856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4950 (or 4944 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 867856 is about 931.5878917204. The cubic root of 867856 is about 95.3855430951.

It can be divided in two parts, 86785 and 6, that multiplied together give a triangular number (520710 = T₁₀₂₀).

The spelling of 867856 in words is "eight hundred sixty-seven thousand, eight hundred fifty-six".