12808449 has 10 divisors (see below), whose sum is σ = 19133730. Its totient is φ = 8538912.

The previous prime is 12808387. The next prime is 12808469. The reversal of 12808449 is 94480821.

It can be written as a sum of positive squares in only one way, i.e., 10036224 + 2772225 = 3168^2 + 1665^2 .

It is not a de Polignac number, because 12808449 - 2⁷ = 12808321 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12808469) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 78984 + ... + 79145.

It is an arithmetic number, because the mean of its divisors is an integer number (1913373).

Almost surely, 2^12808449 is an apocalyptic number.

It is an amenable number.

12808449 is a deficient number, since it is larger than the sum of its proper divisors (6325281).

12808449 is an equidigital number, since it uses as much as digits as its factorization.

12808449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158141 (or 158132 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 12808449 is about 3578.8893528580. The cubic root of 12808449 is about 233.9728765406.

The spelling of 12808449 in words is "twelve million, eight hundred eight thousand, four hundred forty-nine".