12782816 has 24 divisors (see below), whose sum is σ = 25782624. Its totient is φ = 6234880.

The previous prime is 12782807. The next prime is 12782831. The reversal of 12782816 is 61828721.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3560 + ... + 6183.

It is an arithmetic number, because the mean of its divisors is an integer number (1074276).

Almost surely, 2^12782816 is an apocalyptic number.

12782816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12782816 is an abundant number, since it is smaller than the sum of its proper divisors (12999808).

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

12782816 is an equidigital number, since it uses as much as digits as its factorization.

12782816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9794 (or 9786 counting only the distinct ones).

The product of its digits is 10752, while the sum is 35.

The square root of 12782816 is about 3575.3064204345. The cubic root of 12782816 is about 233.8166923428.

The spelling of 12782816 in words is "twelve million, seven hundred eighty-two thousand, eight hundred sixteen".