12516228 has 24 divisors (see below), whose sum is σ = 32449760. Its totient is φ = 4172040.

The previous prime is 12516227. The next prime is 12516247. The reversal of 12516228 is 82261521.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12516227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57838 + ... + 58053.

Almost surely, 2^12516228 is an apocalyptic number.

12516228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12516228 is an abundant number, since it is smaller than the sum of its proper divisors (19933532).

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

12516228 is a wasteful number, since it uses less digits than its factorization.

12516228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115904 (or 115896 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 12516228 is about 3537.8281473243. The cubic root of 12516228 is about 232.1798298553.

Adding to 12516228 its reverse (82261521), we get a palindrome (94777749).

The spelling of 12516228 in words is "twelve million, five hundred sixteen thousand, two hundred twenty-eight".