11023220 has 24 divisors (see below), whose sum is σ = 24930024. Its totient is φ = 4070016.

The previous prime is 11023193. The next prime is 11023223. The reversal of 11023220 is 2232011.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 343396 + 10679824 = 586^2 + 3268^2 .

It is a super-2 number, since 2×11023220² = 243022758336800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11023223) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 20939 + ... + 21458.

It is an arithmetic number, because the mean of its divisors is an integer number (1038751).

Almost surely, 2^11023220 is an apocalyptic number.

11023220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11023220 is an abundant number, since it is smaller than the sum of its proper divisors (13906804).

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

11023220 is a wasteful number, since it uses less digits than its factorization.

11023220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42419 (or 42417 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 11023220 is about 3320.1234916792. The cubic root of 11023220 is about 222.5543864021.

Adding to 11023220 its reverse (2232011), we get a palindrome (13255231).

The spelling of 11023220 in words is "eleven million, twenty-three thousand, two hundred twenty".