13881340 has 24 divisors (see below), whose sum is σ = 31801392. Its totient is φ = 5047680.

The previous prime is 13881337. The next prime is 13881377. The reversal of 13881340 is 4318831.

It is a junction number, because it is equal to n+sod(n) for n = 13881299 and 13881308.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31329 + ... + 31768.

It is an arithmetic number, because the mean of its divisors is an integer number (1325058).

Almost surely, 2^13881340 is an apocalyptic number.

13881340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13881340 is an abundant number, since it is smaller than the sum of its proper divisors (17920052).

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

13881340 is a wasteful number, since it uses less digits than its factorization.

13881340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63117 (or 63115 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 13881340 is about 3725.7670351218. The cubic root of 13881340 is about 240.3313709651.

The spelling of 13881340 in words is "thirteen million, eight hundred eighty-one thousand, three hundred forty".