859804 has 12 divisors (see below), whose sum is σ = 1641528. Its totient is φ = 390800.

The previous prime is 859801. The next prime is 859823. The reversal of 859804 is 408958.

It is a self number, because there is not a number n which added to its sum of digits gives 859804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (859801) by changing a digit.

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, 9727 + ... + 9814.

It is an arithmetic number, because the mean of its divisors is an integer number (136794).

2⁸⁵⁹⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

859804 is a deficient number, since it is larger than the sum of its proper divisors (781724).

859804 is a wasteful number, since it uses less digits than its factorization.

859804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19556 (or 19554 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 859804 is about 927.2561674101. The cubic root of 859804 is about 95.0896291695.

It can be divided in two parts, 85 and 9804, that added together give a palindrome (9889).

The spelling of 859804 in words is "eight hundred fifty-nine thousand, eight hundred four".