1223440443 has 10 divisors (see below), whose sum is σ = 1827608684. Its totient is φ = 815626908.

The previous prime is 1223440423. The next prime is 1223440447. The reversal of 1223440443 is 3440443221.

It is a happy number.

It is not a de Polignac number, because 1223440443 - 2¹⁰ = 1223439419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223440447) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7552021 + ... + 7552182.

Almost surely, 2^1223440443 is an apocalyptic number.

1223440443 is a deficient number, since it is larger than the sum of its proper divisors (604168241).

1223440443 is an equidigital number, since it uses as much as digits as its factorization.

1223440443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15104215 (or 15104206 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 1223440443 is about 34977.7135187536. The cubic root of 1223440443 is about 1069.5332179490.

Adding to 1223440443 its reverse (3440443221), we get a palindrome (4663883664).

The spelling of 1223440443 in words is "one billion, two hundred twenty-three million, four hundred forty thousand, four hundred forty-three".