11202228 has 18 divisors (see below), whose sum is σ = 28316834. Its totient is φ = 3734064.

The previous prime is 11202221. The next prime is 11202241. The reversal of 11202228 is 82220211.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9659664 + 1542564 = 3108^2 + 1242^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 11202228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11202221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 155551 + ... + 155622.

Almost surely, 2^11202228 is an apocalyptic number.

11202228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11202228 is an abundant number, since it is smaller than the sum of its proper divisors (17114606).

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

11202228 is a wasteful number, since it uses less digits than its factorization.

11202228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311183 (or 311178 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 11202228 is about 3346.9729607513. The cubic root of 11202228 is about 223.7526233788.

Adding to 11202228 its reverse (82220211), we get a palindrome (93422439).

The spelling of 11202228 in words is "eleven million, two hundred two thousand, two hundred twenty-eight".