12806438 has 4 divisors (see below), whose sum is σ = 19209660. Its totient is φ = 6403218.

The previous prime is 12806413. The next prime is 12806449. The reversal of 12806438 is 83460821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83460821 = 811 ⋅102911.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3201608 + ... + 3201611.

It is an arithmetic number, because the mean of its divisors is an integer number (4802415).

Almost surely, 2^12806438 is an apocalyptic number.

12806438 is a deficient number, since it is larger than the sum of its proper divisors (6403222).

12806438 is an equidigital number, since it uses as much as digits as its factorization.

12806438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6403221.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 12806438 is about 3578.6083887455. The cubic root of 12806438 is about 233.9606308716.

The spelling of 12806438 in words is "twelve million, eight hundred six thousand, four hundred thirty-eight".