12808809 has 24 divisors (see below), whose sum is σ = 20180160. Its totient is φ = 7781472.

The previous prime is 12808801. The next prime is 12808819. The reversal of 12808809 is 90880821.

12808809 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12808809 - 2³ = 12808801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12808801) 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, 9052 + ... + 10370.

It is an arithmetic number, because the mean of its divisors is an integer number (840840).

Almost surely, 2^12808809 is an apocalyptic number.

It is an amenable number.

12808809 is a deficient number, since it is larger than the sum of its proper divisors (7371351).

12808809 is a wasteful number, since it uses less digits than its factorization.

12808809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421 (or 1418 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 12808809 is about 3578.9396474375. The cubic root of 12808809 is about 233.9750685689.

The spelling of 12808809 in words is "twelve million, eight hundred eight thousand, eight hundred nine".