859818 has 16 divisors (see below), whose sum is σ = 1756800. Its totient is φ = 280416.

The previous prime is 859801. The next prime is 859823. The reversal of 859818 is 818958.

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 7 ways as a sum of consecutive naturals, for example, 1243 + ... + 1806.

It is an arithmetic number, because the mean of its divisors is an integer number (109800).

2⁸⁵⁹⁸¹⁸ is an apocalyptic number.

859818 is an abundant number, since it is smaller than the sum of its proper divisors (896982).

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

859818 is a wasteful number, since it uses less digits than its factorization.

859818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3101.

The product of its digits is 23040, while the sum is 39.

The square root of 859818 is about 927.2637165338. The cubic root of 859818 is about 95.0901452746.

The spelling of 859818 in words is "eight hundred fifty-nine thousand, eight hundred eighteen".