12204036 has 72 divisors (see below), whose sum is σ = 33710040. Its totient is φ = 3700224.

The previous prime is 12204001. The next prime is 12204037. The reversal of 12204036 is 63040221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1115136 + 11088900 = 1056^2 + 3330^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12204037) 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, 41506 + ... + 41798.

It is an arithmetic number, because the mean of its divisors is an integer number (468195).

Almost surely, 2^12204036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12204036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16855020).

12204036 is an abundant number, since it is smaller than the sum of its proper divisors (21506004).

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

12204036 is a wasteful number, since it uses less digits than its factorization.

12204036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405 (or 400 counting only the distinct ones).

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

The square root of 12204036 is about 3493.4275432589. The cubic root of 12204036 is about 230.2331347485.

Adding to 12204036 its reverse (63040221), we get a palindrome (75244257).

The spelling of 12204036 in words is "twelve million, two hundred four thousand, thirty-six".