12210444 has 72 divisors (see below), whose sum is σ = 32366880. Its totient is φ = 3877632.

The previous prime is 12210389. The next prime is 12210449. The reversal of 12210444 is 44401221.

12210444 is a `hidden beast` number, since 1 + 221 + 0 + 444 = 666.

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 (12210449) 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, 118497 + ... + 118599.

It is an arithmetic number, because the mean of its divisors is an integer number (449540).

Almost surely, 2^12210444 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 12210444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16183440).

12210444 is an abundant number, since it is smaller than the sum of its proper divisors (20156436).

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

12210444 is a wasteful number, since it uses less digits than its factorization.

12210444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 12210444 is about 3494.3445737363. The cubic root of 12210444 is about 230.2734240370.

Adding to 12210444 its reverse (44401221), we get a palindrome (56611665).

The spelling of 12210444 in words is "twelve million, two hundred ten thousand, four hundred forty-four".