1123443220 has 24 divisors (see below), whose sum is σ = 2364302304. Its totient is φ = 448411296.

The previous prime is 1123443197. The next prime is 1123443221. The reversal of 1123443220 is 223443211.

It is a junction number, because it is equal to n+sod(n) for n = 1123443191 and 1123443200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123443221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50802 + ... + 69481.

It is an arithmetic number, because the mean of its divisors is an integer number (98512596).

Almost surely, 2^1123443220 is an apocalyptic number.

1123443220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123443220 is an abundant number, since it is smaller than the sum of its proper divisors (1240859084).

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

1123443220 is a wasteful number, since it uses less digits than its factorization.

1123443220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120759 (or 120757 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1123443220 is about 33517.8045223729. The cubic root of 1123443220 is about 1039.5619518612.

Adding to 1123443220 its reverse (223443211), we get a palindrome (1346886431).

Subtracting from 1123443220 its reverse (223443211), we obtain a palindrome (900000009).

The spelling of 1123443220 in words is "one billion, one hundred twenty-three million, four hundred forty-three thousand, two hundred twenty".