12222388 has 36 divisors (see below), whose sum is σ = 23166220. Its totient is φ = 5640192.

The previous prime is 12222367. The next prime is 12222389. The reversal of 12222388 is 88322221.

It can be written as a sum of positive squares in 6 ways, for example, as 1607824 + 10614564 = 1268^2 + 3258^2 .

It is a plaindrome in base 10 and base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222389) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112078 + ... + 112186.

Almost surely, 2^12222388 is an apocalyptic number.

It is an amenable number.

12222388 is a deficient number, since it is larger than the sum of its proper divisors (10943832).

12222388 is a wasteful number, since it uses less digits than its factorization.

12222388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 225 counting only the distinct ones).

The product of its digits is 3072, while the sum is 28.

The square root of 12222388 is about 3496.0532032565. The cubic root of 12222388 is about 230.3484824453.

The spelling of 12222388 in words is "twelve million, two hundred twenty-two thousand, three hundred eighty-eight".