11156228 has 6 divisors (see below), whose sum is σ = 19523406. Its totient is φ = 5578112.

The previous prime is 11156227. The next prime is 11156269. The reversal of 11156228 is 82265111.

It can be written as a sum of positive squares in only one way, i.e., 8340544 + 2815684 = 2888^2 + 1678^2 .

It is a super-2 number, since 2×11156228² = 248922846375968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11156197 and 11156206.

It is not an unprimeable number, because it can be changed into a prime (11156227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1394525 + ... + 1394532.

It is an arithmetic number, because the mean of its divisors is an integer number (3253901).

Almost surely, 2^11156228 is an apocalyptic number.

It is an amenable number.

11156228 is a deficient number, since it is larger than the sum of its proper divisors (8367178).

11156228 is a wasteful number, since it uses less digits than its factorization.

11156228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2789061 (or 2789059 counting only the distinct ones).

The product of its digits is 960, while the sum is 26.

The square root of 11156228 is about 3340.0940106530. The cubic root of 11156228 is about 223.4459361380.

The spelling of 11156228 in words is "eleven million, one hundred fifty-six thousand, two hundred twenty-eight".