858860 has 12 divisors (see below), whose sum is σ = 1803648. Its totient is φ = 343536.

The previous prime is 858859. The next prime is 858877. The reversal of 858860 is 68858.

It is a self number, because there is not a number n which added to its sum of digits gives 858860.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 21452 + ... + 21491.

It is an arithmetic number, because the mean of its divisors is an integer number (150304).

2⁸⁵⁸⁸⁶⁰ is an apocalyptic number.

It is an amenable number.

858860 is an abundant number, since it is smaller than the sum of its proper divisors (944788).

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

858860 is a wasteful number, since it uses less digits than its factorization.

858860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42952 (or 42950 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 858860 is about 926.7469989161. The cubic root of 858860 is about 95.0548160099.

The spelling of 858860 in words is "eight hundred fifty-eight thousand, eight hundred sixty".