12660784 has 40 divisors (see below), whose sum is σ = 26315280. Its totient is φ = 5879808.

The previous prime is 12660779. The next prime is 12660793. The reversal of 12660784 is 48706621.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23947 + ... + 24469.

It is an arithmetic number, because the mean of its divisors is an integer number (657882).

Almost surely, 2^12660784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12660784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13157640).

12660784 is an abundant number, since it is smaller than the sum of its proper divisors (13654496).

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

12660784 is a wasteful number, since it uses less digits than its factorization.

12660784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637 (or 631 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 12660784 is about 3558.1995447136. The cubic root of 12660784 is about 233.0702631519.

The spelling of 12660784 in words is "twelve million, six hundred sixty thousand, seven hundred eighty-four".