11511228 has 12 divisors (see below), whose sum is σ = 26859560. Its totient is φ = 3837072.

The previous prime is 11511217. The next prime is 11511233. The reversal of 11511228 is 82211511.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479623 + ... + 479646.

Almost surely, 2^11511228 is an apocalyptic number.

It is an amenable number.

11511228 is an abundant number, since it is smaller than the sum of its proper divisors (15348332).

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

11511228 is a wasteful number, since it uses less digits than its factorization.

11511228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959276 (or 959274 counting only the distinct ones).

The product of its digits is 160, while the sum is 21.

The square root of 11511228 is about 3392.8200659628. The cubic root of 11511228 is about 225.7913075971.

Adding to 11511228 its reverse (82211511), we get a palindrome (93722739).

The spelling of 11511228 in words is "eleven million, five hundred eleven thousand, two hundred twenty-eight".