12688216 has 8 divisors (see below), whose sum is σ = 23790420. Its totient is φ = 6344104.

The previous prime is 12688213. The next prime is 12688217. The reversal of 12688216 is 61288621.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12688213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 793006 + ... + 793021.

Almost surely, 2^12688216 is an apocalyptic number.

It is an amenable number.

12688216 is a deficient number, since it is larger than the sum of its proper divisors (11102204).

12688216 is a wasteful number, since it uses less digits than its factorization.

12688216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586033 (or 1586029 counting only the distinct ones).

The product of its digits is 9216, while the sum is 34.

The square root of 12688216 is about 3562.0522174724. The cubic root of 12688216 is about 233.2384720972.

The spelling of 12688216 in words is "twelve million, six hundred eighty-eight thousand, two hundred sixteen".