809212868 has 24 divisors (see below), whose sum is σ = 1486833600. Its totient is φ = 384820128.

The previous prime is 809212867. The next prime is 809212889. The reversal of 809212868 is 868212908.

809212868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (809212861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44288 + ... + 59831.

It is an arithmetic number, because the mean of its divisors is an integer number (61951400).

Almost surely, 2^809212868 is an apocalyptic number.

It is an amenable number.

809212868 is a deficient number, since it is larger than the sum of its proper divisors (677620732).

809212868 is a wasteful number, since it uses less digits than its factorization.

809212868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104219 (or 104217 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 809212868 is about 28446.6670806968. The cubic root of 809212868 is about 931.8677030435.

The spelling of 809212868 in words is "eight hundred nine million, two hundred twelve thousand, eight hundred sixty-eight".