12678638 has 8 divisors (see below), whose sum is σ = 21734832. Its totient is φ = 5433696.

The previous prime is 12678637. The next prime is 12678649. The reversal of 12678638 is 83687621.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 12678595 and 12678604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12678637) 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, 452795 + ... + 452822.

It is an arithmetic number, because the mean of its divisors is an integer number (2716854).

Almost surely, 2^12678638 is an apocalyptic number.

12678638 is a deficient number, since it is larger than the sum of its proper divisors (9056194).

12678638 is an equidigital number, since it uses as much as digits as its factorization.

12678638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905626.

The product of its digits is 96768, while the sum is 41.

The square root of 12678638 is about 3560.7075139640. The cubic root of 12678638 is about 233.1797687974.

The spelling of 12678638 in words is "twelve million, six hundred seventy-eight thousand, six hundred thirty-eight".