12036240 has 120 divisors (see below), whose sum is σ = 41154360. Its totient is φ = 3151872.

The previous prime is 12036239. The next prime is 12036257. The reversal of 12036240 is 4263021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4016016 + 8020224 = 2004^2 + 2832^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52446 + ... + 52674.

It is an arithmetic number, because the mean of its divisors is an integer number (342953).

Almost surely, 2^12036240 is an apocalyptic number.

12036240 is a gapful number since it is divisible by the number (10) 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 12036240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20577180).

12036240 is an abundant number, since it is smaller than the sum of its proper divisors (29118120).

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

12036240 is a wasteful number, since it uses less digits than its factorization.

12036240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 12036240 is about 3469.3284652797. The cubic root of 12036240 is about 229.1730860277.

Adding to 12036240 its reverse (4263021), we get a palindrome (16299261).

The spelling of 12036240 in words is "twelve million, thirty-six thousand, two hundred forty".