11838 has 8 divisors (see below), whose sum is σ = 23688. Its totient is φ = 3944.

The previous prime is 11833. The next prime is 11839. The reversal of 11838 is 83811.

It is a happy number.

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

11838 is an admirable number.

It is a Curzon number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11831) by changing a digit.

11838 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 981 + ... + 992.

It is an arithmetic number, because the mean of its divisors is an integer number (2961).

2¹¹⁸³⁸ is an apocalyptic number.

11838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11844).

11838 is a wasteful number, since it uses less digits than its factorization.

11838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1978.

The product of its digits is 192, while the sum is 21.

The square root of 11838 is about 108.8025734990. The cubic root of 11838 is about 22.7907934513.

The spelling of 11838 in words is "eleven thousand, eight hundred thirty-eight".