12809128 has 16 divisors (see below), whose sum is σ = 24192000. Its totient is φ = 6357936.

The previous prime is 12809119. The next prime is 12809129. The reversal of 12809128 is 82190821.

It is a happy number.

12809128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12809128.

It is not an unprimeable number, because it can be changed into a prime (12809129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4648 + ... + 6871.

It is an arithmetic number, because the mean of its divisors is an integer number (1512000).

Almost surely, 2^12809128 is an apocalyptic number.

It is an amenable number.

12809128 is a deficient number, since it is larger than the sum of its proper divisors (11382872).

12809128 is a wasteful number, since it uses less digits than its factorization.

12809128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11664 (or 11660 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 12809128 is about 3578.9842134326. The cubic root of 12809128 is about 233.9770109151.

Adding to 12809128 its reverse (82190821), we get a palindrome (94999949).

The spelling of 12809128 in words is "twelve million, eight hundred nine thousand, one hundred twenty-eight".