12889836 has 18 divisors (see below), whose sum is σ = 32582732. Its totient is φ = 4296600.

The previous prime is 12889823. The next prime is 12889843. The reversal of 12889836 is 63898821.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×12889836² = 332295744213792, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12889791 and 12889800.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 178990 + ... + 179061.

Almost surely, 2^12889836 is an apocalyptic number.

It is an amenable number.

12889836 is an abundant number, since it is smaller than the sum of its proper divisors (19692896).

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

12889836 is a wasteful number, since it uses less digits than its factorization.

12889836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358061 (or 358056 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 12889836 is about 3590.2417745884. The cubic root of 12889836 is about 234.4673980223.

The spelling of 12889836 in words is "twelve million, eight hundred eighty-nine thousand, eight hundred thirty-six".