856216 has 32 divisors (see below), whose sum is σ = 1742400. Its totient is φ = 393120.

The previous prime is 856213. The next prime is 856237. The reversal of 856216 is 612658.

856216 = T₁₉₃ + T₁₉₄ + ... + T₂₃₀.

856216 is nontrivially palindromic in base 9.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6471 + ... + 6601.

It is an arithmetic number, because the mean of its divisors is an integer number (54450).

2⁸⁵⁶²¹⁶ is an apocalyptic number.

856216 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is an amenable number.

856216 is an abundant number, since it is smaller than the sum of its proper divisors (886184).

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

856216 is a wasteful number, since it uses less digits than its factorization.

856216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 195 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 856216 is about 925.3194043140. The cubic root of 856216 is about 94.9571736791.

The spelling of 856216 in words is "eight hundred fifty-six thousand, two hundred sixteen".