12808444 has 12 divisors (see below), whose sum is σ = 24452568. Its totient is φ = 5822000.

The previous prime is 12808387. The next prime is 12808469. The reversal of 12808444 is 44480821.

It is a super-2 number, since 2×12808444² = 328112475402272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 145507 + ... + 145594.

It is an arithmetic number, because the mean of its divisors is an integer number (2037714).

Almost surely, 2^12808444 is an apocalyptic number.

It is an amenable number.

12808444 is a deficient number, since it is larger than the sum of its proper divisors (11644124).

12808444 is a wasteful number, since it uses less digits than its factorization.

12808444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291116 (or 291114 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 31.

The square root of 12808444 is about 3578.8886543171. Note that the first 3 decimals coincide. The cubic root of 12808444 is about 233.9728460955.

The spelling of 12808444 in words is "twelve million, eight hundred eight thousand, four hundred forty-four".