12809644 has 6 divisors (see below), whose sum is σ = 22416884. Its totient is φ = 6404820.

The previous prime is 12809633. The next prime is 12809647. The reversal of 12809644 is 44690821.

It is not an unprimeable number, because it can be changed into a prime (12809647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1601202 + ... + 1601209.

Almost surely, 2^12809644 is an apocalyptic number.

It is an amenable number.

12809644 is a deficient number, since it is larger than the sum of its proper divisors (9607240).

12809644 is a wasteful number, since it uses less digits than its factorization.

12809644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3202415 (or 3202413 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 12809644 is about 3579.0563001998. The cubic root of 12809644 is about 233.9801526985.

The spelling of 12809644 in words is "twelve million, eight hundred nine thousand, six hundred forty-four".