805816864 has 24 divisors (see below), whose sum is σ = 1679773788. Its totient is φ = 379207680.

The previous prime is 805816859. The next prime is 805816901. The reversal of 805816864 is 468618508.

It can be written as a sum of positive squares in 2 ways, for example, as 668739600 + 137077264 = 25860^2 + 11708^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 740097 + ... + 741184.

Almost surely, 2^805816864 is an apocalyptic number.

It is an amenable number.

805816864 is an abundant number, since it is smaller than the sum of its proper divisors (873956924).

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

805816864 is a wasteful number, since it uses less digits than its factorization.

805816864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481308 (or 1481300 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 46.

The square root of 805816864 is about 28386.9136046876. The cubic root of 805816864 is about 930.5622930197.

The spelling of 805816864 in words is "eight hundred five million, eight hundred sixteen thousand, eight hundred sixty-four".