12809424 has 20 divisors (see below), whose sum is σ = 33091136. Its totient is φ = 4269792.

The previous prime is 12809359. The next prime is 12809491. The reversal of 12809424 is 42490821.

It is a junction number, because it is equal to n+sod(n) for n = 12809391 and 12809400.

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 in 3 ways as a sum of consecutive naturals, for example, 133384 + ... + 133479.

Almost surely, 2^12809424 is an apocalyptic number.

It is an amenable number.

12809424 is an abundant number, since it is smaller than the sum of its proper divisors (20281712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12809424 is a wasteful number, since it uses less digits than its factorization.

12809424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266874 (or 266868 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 12809424 is about 3579.0255657092. The cubic root of 12809424 is about 233.9788131888.

The spelling of 12809424 in words is "twelve million, eight hundred nine thousand, four hundred twenty-four".