858856 has 8 divisors (see below), whose sum is σ = 1610370. Its totient is φ = 429424.

The previous prime is 858841. The next prime is 858859. The reversal of 858856 is 658858.

858856 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., 749956 + 108900 = 866^2 + 330^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (858859) by changing a digit.

858856 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 as a sum of consecutive naturals, namely, 53671 + ... + 53686.

2⁸⁵⁸⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

858856 is a deficient number, since it is larger than the sum of its proper divisors (751514).

858856 is a wasteful number, since it uses less digits than its factorization.

858856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107363 (or 107359 counting only the distinct ones).

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

The square root of 858856 is about 926.7448408273. The cubic root of 858856 is about 95.0546684423.

The spelling of 858856 in words is "eight hundred fifty-eight thousand, eight hundred fifty-six".