12808940 has 24 divisors (see below), whose sum is σ = 27043632. Its totient is φ = 5096000.

The previous prime is 12808937. The next prime is 12808949. The reversal of 12808940 is 4980821.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12808897 and 12808906.

It is not an unprimeable number, because it can be changed into a prime (12808949) 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 in 7 ways as a sum of consecutive naturals, for example, 2315 + ... + 5565.

It is an arithmetic number, because the mean of its divisors is an integer number (1126818).

Almost surely, 2^12808940 is an apocalyptic number.

12808940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12808940 is an abundant number, since it is smaller than the sum of its proper divisors (14234692).

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

12808940 is a wasteful number, since it uses less digits than its factorization.

12808940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3457 (or 3455 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 12808940 is about 3578.9579489008. The cubic root of 12808940 is about 233.9758662134.

The spelling of 12808940 in words is "twelve million, eight hundred eight thousand, nine hundred forty".