13881366 has 24 divisors (see below), whose sum is σ = 31047744. Its totient is φ = 4477680.

The previous prime is 13881337. The next prime is 13881377. The reversal of 13881366 is 66318831.

It is a self number, because there is not a number n which added to its sum of digits gives 13881366.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 11881 + ... + 12996.

It is an arithmetic number, because the mean of its divisors is an integer number (1293656).

Almost surely, 2^13881366 is an apocalyptic number.

13881366 is an abundant number, since it is smaller than the sum of its proper divisors (17166378).

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

13881366 is a wasteful number, since it uses less digits than its factorization.

13881366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24916 (or 24913 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 13881366 is about 3725.7705243345. The cubic root of 13881366 is about 240.3315210134.

The spelling of 13881366 in words is "thirteen million, eight hundred eighty-one thousand, three hundred sixty-six".