11421228 has 48 divisors (see below), whose sum is σ = 32802560. Its totient is φ = 3011904.

The previous prime is 11421211. The next prime is 11421233. The reversal of 11421228 is 82212411.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 15 ways as a sum of consecutive naturals, for example, 4138 + ... + 6321.

Almost surely, 2^11421228 is an apocalyptic number.

It is an amenable number.

11421228 is an abundant number, since it is smaller than the sum of its proper divisors (21381332).

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

11421228 is a wasteful number, since it uses less digits than its factorization.

11421228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10486 (or 10484 counting only the distinct ones).

The product of its digits is 256, while the sum is 21.

The square root of 11421228 is about 3379.5307366556. The cubic root of 11421228 is about 225.2013210468.

Adding to 11421228 its reverse (82212411), we get a palindrome (93633639).

The spelling of 11421228 in words is "eleven million, four hundred twenty-one thousand, two hundred twenty-eight".