12688678 has 8 divisors (see below), whose sum is σ = 19072368. Its totient is φ = 6331224.

The previous prime is 12688649. The next prime is 12688679. The reversal of 12688678 is 87688621.

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

It is a super-2 number, since 2×12688678² = 322005098775368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12688679) 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 in 3 ways as a sum of consecutive naturals, for example, 5301 + ... + 7312.

It is an arithmetic number, because the mean of its divisors is an integer number (2384046).

Almost surely, 2^12688678 is an apocalyptic number.

12688678 is a deficient number, since it is larger than the sum of its proper divisors (6383690).

12688678 is a wasteful number, since it uses less digits than its factorization.

12688678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13118.

The product of its digits is 258048, while the sum is 46.

The square root of 12688678 is about 3562.1170671386. The cubic root of 12688678 is about 233.2413029355.

It can be divided in two parts, 12688 and 678, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 12688678 in words is "twelve million, six hundred eighty-eight thousand, six hundred seventy-eight".