12689828 has 12 divisors (see below), whose sum is σ = 22749132. Its totient is φ = 6190080.

The previous prime is 12689821. The next prime is 12689857. The reversal of 12689828 is 82898621.

It can be written as a sum of positive squares in 2 ways, for example, as 2244004 + 10445824 = 1498^2 + 3232^2 .

It is a super-2 number, since 2×12689828² = 322063469339168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12689821) 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, 38525 + ... + 38852.

It is an arithmetic number, because the mean of its divisors is an integer number (1895761).

Almost surely, 2^12689828 is an apocalyptic number.

It is an amenable number.

12689828 is a deficient number, since it is larger than the sum of its proper divisors (10059304).

12689828 is a wasteful number, since it uses less digits than its factorization.

12689828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77422 (or 77420 counting only the distinct ones).

The product of its digits is 110592, while the sum is 44.

The square root of 12689828 is about 3562.2784843412. The cubic root of 12689828 is about 233.2483490963.

The spelling of 12689828 in words is "twelve million, six hundred eighty-nine thousand, eight hundred twenty-eight".