11886381 has 24 divisors (see below), whose sum is σ = 19466720. Its totient is φ = 6928416.

The previous prime is 11886379. The next prime is 11886397. The reversal of 11886381 is 18368811.

11886381 is a `hidden beast` number, since 1 + 18 + 8 + 638 + 1 = 666.

It is not a de Polignac number, because 11886381 - 2¹ = 11886379 is a prime.

It is a super-2 number, since 2×11886381² = 282572106554322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11886481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 451 + ... + 4896.

Almost surely, 2^11886381 is an apocalyptic number.

It is an amenable number.

11886381 is a deficient number, since it is larger than the sum of its proper divisors (7580339).

11886381 is a wasteful number, since it uses less digits than its factorization.

11886381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5385 (or 5382 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 11886381 is about 3447.6631215941. The cubic root of 11886381 is about 228.2179932622.

It can be divided in two parts, 1188 and 6381, that added together give a square (7569 = 87²).

The spelling of 11886381 in words is "eleven million, eight hundred eighty-six thousand, three hundred eighty-one".