859985805 has 32 divisors (see below), whose sum is σ = 1580730624. Its totient is φ = 391090176.

The previous prime is 859985759. The next prime is 859985821. The reversal of 859985805 is 508589958.

859985805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 859985805 - 2⁶ = 859985741 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 954 + ... + 41483.

It is an arithmetic number, because the mean of its divisors is an integer number (49397832).

Almost surely, 2^859985805 is an apocalyptic number.

It is an amenable number.

859985805 is a deficient number, since it is larger than the sum of its proper divisors (720744819).

859985805 is a wasteful number, since it uses less digits than its factorization.

859985805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42645.

The product of its (nonzero) digits is 5184000, while the sum is 57.

The square root of 859985805 is about 29325.5145734904. The cubic root of 859985805 is about 950.9633091071.

The spelling of 859985805 in words is "eight hundred fifty-nine million, nine hundred eighty-five thousand, eight hundred five".