806785 has 24 divisors (see below), whose sum is σ = 1169640. Its totient is φ = 532224.

The previous prime is 806783. The next prime is 806789. The reversal of 806785 is 587608.

It can be written as a sum of positive squares in 4 ways, for example, as 112896 + 693889 = 336^2 + 833^2 .

It is not a de Polignac number, because 806785 - 2¹ = 806783 is a prime.

806785 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 806785.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806783) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9021 + ... + 9109.

It is an arithmetic number, because the mean of its divisors is an integer number (48735).

2⁸⁰⁶⁷⁸⁵ is an apocalyptic number.

It is an amenable number.

806785 is a deficient number, since it is larger than the sum of its proper divisors (362855).

806785 is a wasteful number, since it uses less digits than its factorization.

806785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 806785 is about 898.2121130334. The cubic root of 806785 is about 93.0934813685.

The spelling of 806785 in words is "eight hundred six thousand, seven hundred eighty-five".