805866512 has 80 divisors (see below), whose sum is σ = 1787242752. Its totient is φ = 348687360.

The previous prime is 805866497. The next prime is 805866517. The reversal of 805866512 is 215668508.

It is a super-2 number, since 2×805866512² = 1298841670326092288, 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 805866512.

It is not an unprimeable number, because it can be changed into a prime (805866517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304748 + ... + 307380.

Almost surely, 2^805866512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 805866512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (893621376).

805866512 is an abundant number, since it is smaller than the sum of its proper divisors (981376240).

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

805866512 is a wasteful number, since it uses less digits than its factorization.

805866512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2736 (or 2730 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 805866512 is about 28387.7880786792. The cubic root of 805866512 is about 930.5814038996.

The spelling of 805866512 in words is "eight hundred five million, eight hundred sixty-six thousand, five hundred twelve".