12809416 has 16 divisors (see below), whose sum is σ = 24846300. Its totient is φ = 6183744.

The previous prime is 12809359. The next prime is 12809491. The reversal of 12809416 is 61490821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12744900 + 64516 = 3570^2 + 254^2 .

It is a super-2 number, since 2×12809416² = 328162276522112, which contains 22 as substring.

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 in 3 ways as a sum of consecutive naturals, for example, 27375 + ... + 27838.

Almost surely, 2^12809416 is an apocalyptic number.

It is an amenable number.

12809416 is a deficient number, since it is larger than the sum of its proper divisors (12036884).

12809416 is a wasteful number, since it uses less digits than its factorization.

12809416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55248 (or 55244 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 12809416 is about 3579.0244480864. The cubic root of 12809416 is about 233.9787644790.

It can be divided in two parts, 12809 and 416, that added together give a square (13225 = 115²).

The spelling of 12809416 in words is "twelve million, eight hundred nine thousand, four hundred sixteen".