855860 has 12 divisors (see below), whose sum is σ = 1797348. Its totient is φ = 342336.

The previous prime is 855857. The next prime is 855863. The reversal of 855860 is 68558.

855860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (855857) and next prime (855863).

It can be written as a sum of positive squares in 2 ways, for example, as 376996 + 478864 = 614^2 + 692^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 855860.

It is not an unprimeable number, because it can be changed into a prime (855863) 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, 21377 + ... + 21416.

It is an arithmetic number, because the mean of its divisors is an integer number (149779).

2⁸⁵⁵⁸⁶⁰ is an apocalyptic number.

It is an amenable number.

855860 is an abundant number, since it is smaller than the sum of its proper divisors (941488).

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

855860 is a wasteful number, since it uses less digits than its factorization.

855860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42802 (or 42800 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 855860 is about 925.1270183061. The cubic root of 855860 is about 94.9440113306.

The spelling of 855860 in words is "eight hundred fifty-five thousand, eight hundred sixty".