12828891 has 8 divisors (see below), whose sum is σ = 17155600. Its totient is φ = 8527392.

The previous prime is 12828853. The next prime is 12828911. The reversal of 12828891 is 19882821.

12828891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12828891 - 2⁷ = 12828763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12828811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5080 + ... + 7173.

It is an arithmetic number, because the mean of its divisors is an integer number (2144450).

Almost surely, 2^12828891 is an apocalyptic number.

12828891 is a deficient number, since it is larger than the sum of its proper divisors (4326709).

12828891 is a wasteful number, since it uses less digits than its factorization.

12828891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12605.

The product of its digits is 18432, while the sum is 39.

The square root of 12828891 is about 3581.7441282146. The cubic root of 12828891 is about 234.0972822185.

The spelling of 12828891 in words is "twelve million, eight hundred twenty-eight thousand, eight hundred ninety-one".