12017838 has 48 divisors (see below), whose sum is σ = 28670544. Its totient is φ = 3346560.

The previous prime is 12017833. The next prime is 12017839. The reversal of 12017838 is 83871021.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12017833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11556 + ... + 12552.

It is an arithmetic number, because the mean of its divisors is an integer number (597303).

Almost surely, 2^12017838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12017838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14335272).

12017838 is an abundant number, since it is smaller than the sum of its proper divisors (16652706).

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

12017838 is a wasteful number, since it uses less digits than its factorization.

12017838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057 (or 1050 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 12017838 is about 3466.6753525532. The cubic root of 12017838 is about 229.0562335284.

Adding to 12017838 its reverse (83871021), we get a palindrome (95888859).

The spelling of 12017838 in words is "twelve million, seventeen thousand, eight hundred thirty-eight".