13839966 has 24 divisors (see below), whose sum is σ = 34270704. Its totient is φ = 3954240.

The previous prime is 13839953. The next prime is 13839971. The reversal of 13839966 is 66993831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54795 + ... + 55046.

It is an arithmetic number, because the mean of its divisors is an integer number (1427946).

Almost surely, 2^13839966 is an apocalyptic number.

13839966 is an abundant number, since it is smaller than the sum of its proper divisors (20430738).

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

13839966 is a wasteful number, since it uses less digits than its factorization.

13839966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109856 (or 109853 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 13839966 is about 3720.2104779165. The cubic root of 13839966 is about 240.0923602853.

It can be divided in two parts, 138 and 39966, that added together give a palindrome (40104).

The spelling of 13839966 in words is "thirteen million, eight hundred thirty-nine thousand, nine hundred sixty-six".