12808815 has 32 divisors (see below), whose sum is σ = 21620736. Its totient is φ = 6462720.

The previous prime is 12808801. The next prime is 12808819. The reversal of 12808815 is 51880821.

It is not a de Polignac number, because 12808815 - 2⁶ = 12808751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12808819) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47130 + ... + 47400.

It is an arithmetic number, because the mean of its divisors is an integer number (675648).

Almost surely, 2^12808815 is an apocalyptic number.

12808815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12808815 is a deficient number, since it is larger than the sum of its proper divisors (8811921).

12808815 is a wasteful number, since it uses less digits than its factorization.

12808815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439.

The product of its (nonzero) digits is 5120, while the sum is 33.

The square root of 12808815 is about 3578.9404856745. The cubic root of 12808815 is about 233.9751051023.

The spelling of 12808815 in words is "twelve million, eight hundred eight thousand, eight hundred fifteen".