855868 has 24 divisors (see below), whose sum is σ = 1638560. Its totient is φ = 388800.

The previous prime is 855863. The next prime is 855887. The reversal of 855868 is 868558.

It is a self number, because there is not a number n which added to its sum of digits gives 855868.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5593 + ... + 5743.

2⁸⁵⁵⁸⁶⁸ is an apocalyptic number.

It is an amenable number.

855868 is a deficient number, since it is larger than the sum of its proper divisors (782692).

855868 is a wasteful number, since it uses less digits than its factorization.

855868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277 (or 275 counting only the distinct ones).

The product of its digits is 76800, while the sum is 40.

The square root of 855868 is about 925.1313420266. The cubic root of 855868 is about 94.9443071538.

The spelling of 855868 in words is "eight hundred fifty-five thousand, eight hundred sixty-eight".