12728896 has 28 divisors (see below), whose sum is σ = 25694640. Its totient is φ = 6254720.

The previous prime is 12728893. The next prime is 12728923. The reversal of 12728896 is 69882721.

It is not an unprimeable number, because it can be changed into a prime (12728893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2091 + ... + 5461.

Almost surely, 2^12728896 is an apocalyptic number.

12728896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12728896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12847320).

12728896 is an abundant number, since it is smaller than the sum of its proper divisors (12965744).

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

12728896 is an equidigital number, since it uses as much as digits as its factorization.

12728896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3442 (or 3432 counting only the distinct ones).

The product of its digits is 96768, while the sum is 43.

The square root of 12728896 is about 3567.7578393159. The cubic root of 12728896 is about 233.4874700391.

The spelling of 12728896 in words is "twelve million, seven hundred twenty-eight thousand, eight hundred ninety-six".