12240228 has 96 divisors (see below), whose sum is σ = 38384640. Its totient is φ = 2931840.

The previous prime is 12240227. The next prime is 12240271. The reversal of 12240228 is 82204221.

It is a happy number.

12240228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (12240223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11503 + ... + 12521.

It is an arithmetic number, because the mean of its divisors is an integer number (399840).

Almost surely, 2^12240228 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 12240228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19192320).

12240228 is an abundant number, since it is smaller than the sum of its proper divisors (26144412).

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

12240228 is a wasteful number, since it uses less digits than its factorization.

12240228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057 (or 1055 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 12240228 is about 3498.6037214866. The cubic root of 12240228 is about 230.4605014483.

Adding to 12240228 its reverse (82204221), we get a palindrome (94444449).

The spelling of 12240228 in words is "twelve million, two hundred forty thousand, two hundred twenty-eight".