12687678 has 60 divisors (see below), whose sum is σ = 30311952. Its totient is φ = 3965760.

The previous prime is 12687673. The next prime is 12687679. The reversal of 12687678 is 87678621.

12687678 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12687671) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 46683 + ... + 46953.

Almost surely, 2^12687678 is an apocalyptic number.

12687678 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12687678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15155976).

12687678 is an abundant number, since it is smaller than the sum of its proper divisors (17624274).

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

12687678 is a wasteful number, since it uses less digits than its factorization.

12687678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319 (or 293 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 12687678 is about 3561.9766984078. The cubic root of 12687678 is about 233.2351754931.

The spelling of 12687678 in words is "twelve million, six hundred eighty-seven thousand, six hundred seventy-eight".