13881386 has 8 divisors (see below), whose sum is σ = 20842500. Its totient is φ = 6933888.

The previous prime is 13881383. The next prime is 13881391. The reversal of 13881386 is 68318831.

It can be written as a sum of positive squares in 2 ways, for example, as 13184161 + 697225 = 3631^2 + 835^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (13881383) 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 3 ways as a sum of consecutive naturals, for example, 281 + ... + 5276.

Almost surely, 2^13881386 is an apocalyptic number.

13881386 is a deficient number, since it is larger than the sum of its proper divisors (6961114).

13881386 is a wasteful number, since it uses less digits than its factorization.

13881386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6808.

The product of its digits is 27648, while the sum is 38.

The square root of 13881386 is about 3725.7732083421. The cubic root of 13881386 is about 240.3316364350.

The spelling of 13881386 in words is "thirteen million, eight hundred eighty-one thousand, three hundred eighty-six".