12840928 has 12 divisors (see below), whose sum is σ = 25280640. Its totient is φ = 6420448.

The previous prime is 12840911. The next prime is 12840931. The reversal of 12840928 is 82904821.

It is a junction number, because it is equal to n+sod(n) for n = 12840893 and 12840902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200608 + ... + 200671.

It is an arithmetic number, because the mean of its divisors is an integer number (2106720).

Almost surely, 2^12840928 is an apocalyptic number.

It is an amenable number.

12840928 is a deficient number, since it is larger than the sum of its proper divisors (12439712).

12840928 is an equidigital number, since it uses as much as digits as its factorization.

12840928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401289 (or 401281 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 12840928 is about 3583.4240608669. The cubic root of 12840928 is about 234.1704750390.

The spelling of 12840928 in words is "twelve million, eight hundred forty thousand, nine hundred twenty-eight".