13228228 has 12 divisors (see below), whose sum is σ = 24930220. Its totient is φ = 6105312.

The previous prime is 13228211. The next prime is 13228247. The reversal of 13228228 is 82282231.

It can be written as a sum of positive squares in 2 ways, for example, as 4359744 + 8868484 = 2088^2 + 2978^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13228196 and 13228205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127143 + ... + 127246.

Almost surely, 2^13228228 is an apocalyptic number.

It is an amenable number.

13228228 is a deficient number, since it is larger than the sum of its proper divisors (11701992).

13228228 is a wasteful number, since it uses less digits than its factorization.

13228228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254406 (or 254404 counting only the distinct ones).

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

The square root of 13228228 is about 3637.0631009099. The cubic root of 13228228 is about 236.5014951029.

It can be divided in two parts, 13228 and 228, that added together give a square (13456 = 116²).

The spelling of 13228228 in words is "thirteen million, two hundred twenty-eight thousand, two hundred twenty-eight".