856386 has 16 divisors (see below), whose sum is σ = 1903200. Its totient is φ = 285444.

The previous prime is 856381. The next prime is 856391. The reversal of 856386 is 683658.

It is an interprime number because it is at equal distance from previous prime (856381) and next prime (856391).

It is a self number, because there is not a number n which added to its sum of digits gives 856386.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 856386.

It is not an unprimeable number, because it can be changed into a prime (856381) 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, 7876 + ... + 7983.

It is an arithmetic number, because the mean of its divisors is an integer number (118950).

2⁸⁵⁶³⁸⁶ is an apocalyptic number.

856386 is an abundant number, since it is smaller than the sum of its proper divisors (1046814).

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

856386 is a wasteful number, since it uses less digits than its factorization.

856386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15870 (or 15864 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 856386 is about 925.4112599272. The cubic root of 856386 is about 94.9634577831.

It can be divided in two parts, 8563 and 86, that added together give a square (8649 = 93²).

The spelling of 856386 in words is "eight hundred fifty-six thousand, three hundred eighty-six".