12688536 has 32 divisors (see below), whose sum is σ = 36253440. Its totient is φ = 3625248.

The previous prime is 12688531. The next prime is 12688547. The reversal of 12688536 is 63588621.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12688494 and 12688503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12688531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37596 + ... + 37931.

It is an arithmetic number, because the mean of its divisors is an integer number (1132920).

Almost surely, 2^12688536 is an apocalyptic number.

It is an amenable number.

12688536 is an abundant number, since it is smaller than the sum of its proper divisors (23564904).

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

12688536 is a wasteful number, since it uses less digits than its factorization.

12688536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75543 (or 75539 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 12688536 is about 3562.0971351158. The cubic root of 12688536 is about 233.2404328583.

The spelling of 12688536 in words is "twelve million, six hundred eighty-eight thousand, five hundred thirty-six".