13888381 has 16 divisors (see below), whose sum is σ = 15579648. Its totient is φ = 12297600.

The previous prime is 13888379. The next prime is 13888387. The reversal of 13888381 is 18388831.

It is a cyclic number.

It is not a de Polignac number, because 13888381 - 2¹ = 13888379 is a prime.

It is a super-2 number, since 2×13888381² = 385774253602322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13888387) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 37660 + ... + 38026.

It is an arithmetic number, because the mean of its divisors is an integer number (973728).

Almost surely, 2^13888381 is an apocalyptic number.

It is an amenable number.

13888381 is a deficient number, since it is larger than the sum of its proper divisors (1691267).

13888381 is a wasteful number, since it uses less digits than its factorization.

13888381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492.

The product of its digits is 36864, while the sum is 40.

The square root of 13888381 is about 3726.7118214319. The cubic root of 13888381 is about 240.3719983387.

The spelling of 13888381 in words is "thirteen million, eight hundred eighty-eight thousand, three hundred eighty-one".