12939684 has 72 divisors (see below), whose sum is σ = 33284160. Its totient is φ = 3907008.

The previous prime is 12939683. The next prime is 12939697. The reversal of 12939684 is 48693921.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (12939683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125577 + ... + 125679.

It is an arithmetic number, because the mean of its divisors is an integer number (462280).

Almost surely, 2^12939684 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 12939684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16642080).

12939684 is an abundant number, since it is smaller than the sum of its proper divisors (20344476).

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

12939684 is a wasteful number, since it uses less digits than its factorization.

12939684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177 (or 156 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 12939684 is about 3597.1772266598. The cubic root of 12939684 is about 234.7692559293.

The spelling of 12939684 in words is "twelve million, nine hundred thirty-nine thousand, six hundred eighty-four".