858887 has 4 divisors (see below), whose sum is σ = 871056. Its totient is φ = 846720.

The previous prime is 858883. The next prime is 858899. The reversal of 858887 is 788858.

858887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 858887 - 2² = 858883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858883) 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, 5978 + ... + 6119.

It is an arithmetic number, because the mean of its divisors is an integer number (217764).

2⁸⁵⁸⁸⁸⁷ is an apocalyptic number.

858887 is a deficient number, since it is larger than the sum of its proper divisors (12169).

858887 is a wasteful number, since it uses less digits than its factorization.

858887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12168.

The product of its digits is 143360, while the sum is 44.

The square root of 858887 is about 926.7615658841. The cubic root of 858887 is about 95.0558120796.

The spelling of 858887 in words is "eight hundred fifty-eight thousand, eight hundred eighty-seven".