11221628 has 48 divisors (see below), whose sum is σ = 23331840. Its totient is φ = 4665600.

The previous prime is 11221627. The next prime is 11221643. The reversal of 11221628 is 82612211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25700 + ... + 26132.

It is an arithmetic number, because the mean of its divisors is an integer number (486080).

Almost surely, 2^11221628 is an apocalyptic number.

It is an amenable number.

11221628 is an abundant number, since it is smaller than the sum of its proper divisors (12110212).

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

11221628 is a wasteful number, since it uses less digits than its factorization.

11221628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498 (or 496 counting only the distinct ones).

The product of its digits is 384, while the sum is 23.

The square root of 11221628 is about 3349.8698482180. The cubic root of 11221628 is about 223.8817136962.

Adding to 11221628 its reverse (82612211), we get a palindrome (93833839).

The spelling of 11221628 in words is "eleven million, two hundred twenty-one thousand, six hundred twenty-eight".