805939816 has 16 divisors (see below), whose sum is σ = 1648513440. Its totient is φ = 366336240.

The previous prime is 805939811. The next prime is 805939831. The reversal of 805939816 is 618939508.

It is a super-2 number, since 2×805939816² = 1299077974028227712, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 805939816.

It is not an unprimeable number, because it can be changed into a prime (805939811) 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, 4579116 + ... + 4579291.

It is an arithmetic number, because the mean of its divisors is an integer number (103032090).

Almost surely, 2^805939816 is an apocalyptic number.

It is an amenable number.

805939816 is an abundant number, since it is smaller than the sum of its proper divisors (842573624).

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

805939816 is a wasteful number, since it uses less digits than its factorization.

805939816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9158424 (or 9158420 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 805939816 is about 28389.0791678772. The cubic root of 805939816 is about 930.6096191892.

It can be divided in two parts, 80593 and 9816, that added together give a palindrome (90409).

The spelling of 805939816 in words is "eight hundred five million, nine hundred thirty-nine thousand, eight hundred sixteen".