11171228 has 24 divisors (see below), whose sum is σ = 20224512. Its totient is φ = 5395824.

The previous prime is 11171207. The next prime is 11171239. The reversal of 11171228 is 82217111.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18101 + ... + 18707.

It is an arithmetic number, because the mean of its divisors is an integer number (842688).

Almost surely, 2^11171228 is an apocalyptic number.

It is an amenable number.

11171228 is a deficient number, since it is larger than the sum of its proper divisors (9053284).

11171228 is a wasteful number, since it uses less digits than its factorization.

11171228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761 (or 759 counting only the distinct ones).

The product of its digits is 224, while the sum is 23.

The square root of 11171228 is about 3342.3387021665. The cubic root of 11171228 is about 223.5460353234.

Adding to 11171228 its reverse (82217111), we get a palindrome (93388339).

The spelling of 11171228 in words is "eleven million, one hundred seventy-one thousand, two hundred twenty-eight".