12138336 has 144 divisors (see below), whose sum is σ = 41094144. Its totient is φ = 3452544.

The previous prime is 12138317. The next prime is 12138353. The reversal of 12138336 is 63383121.

It is a happy number.

12138336 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54321 + ... + 54543.

It is an arithmetic number, because the mean of its divisors is an integer number (285376).

Almost surely, 2^12138336 is an apocalyptic number.

12138336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12138336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20547072).

12138336 is an abundant number, since it is smaller than the sum of its proper divisors (28955808).

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

12138336 is an equidigital number, since it uses as much as digits as its factorization.

12138336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 235 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 12138336 is about 3484.0114810373. The cubic root of 12138336 is about 229.8192404590.

The spelling of 12138336 in words is "twelve million, one hundred thirty-eight thousand, three hundred thirty-six".