12687688 has 16 divisors (see below), whose sum is σ = 25619580. Its totient is φ = 5855808.

The previous prime is 12687683. The next prime is 12687733. The reversal of 12687688 is 88678621.

It can be written as a sum of positive squares in 2 ways, for example, as 12376324 + 311364 = 3518^2 + 558^2 .

It is not an unprimeable number, because it can be changed into a prime (12687683) 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, 60895 + ... + 61102.

Almost surely, 2^12687688 is an apocalyptic number.

It is an amenable number.

12687688 is an abundant number, since it is smaller than the sum of its proper divisors (12931892).

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

12687688 is a wasteful number, since it uses less digits than its factorization.

12687688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122016 (or 122012 counting only the distinct ones).

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

The square root of 12687688 is about 3561.9781021225. The cubic root of 12687688 is about 233.2352367692.

The spelling of 12687688 in words is "twelve million, six hundred eighty-seven thousand, six hundred eighty-eight".