11289220 has 24 divisors (see below), whose sum is σ = 24260544. Its totient is φ = 4410336.

The previous prime is 11289203. The next prime is 11289233. The reversal of 11289220 is 2298211.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5704 + ... + 7423.

It is an arithmetic number, because the mean of its divisors is an integer number (1010856).

Almost surely, 2^11289220 is an apocalyptic number.

11289220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11289220 is an abundant number, since it is smaller than the sum of its proper divisors (12971324).

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

11289220 is a wasteful number, since it uses less digits than its factorization.

11289220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13179 (or 13177 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 11289220 is about 3359.9434519051. The cubic root of 11289220 is about 224.3303215381.

The spelling of 11289220 in words is "eleven million, two hundred eighty-nine thousand, two hundred twenty".