858906 has 12 divisors (see below), whose sum is σ = 1861002. Its totient is φ = 286296.

The previous prime is 858899. The next prime is 858911. The reversal of 858906 is 609858.

858906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 793881 + 65025 = 891^2 + 255^2 .

It is an Ulam number.

It is an unprimeable number.

858906 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23841 + ... + 23876.

2⁸⁵⁸⁹⁰⁶ is an apocalyptic number.

858906 is an abundant number, since it is smaller than the sum of its proper divisors (1002096).

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

858906 is a wasteful number, since it uses less digits than its factorization.

858906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47725 (or 47722 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 858906 is about 926.7718165762. The cubic root of 858906 is about 95.0565130050.

It can be divided in two parts, 858 and 906, that added together give a square (1764 = 42²).

The spelling of 858906 in words is "eight hundred fifty-eight thousand, nine hundred six".