1244040223 has 4 divisors (see below), whose sum is σ = 1246513968. Its totient is φ = 1241566480.

The previous prime is 1244040209. The next prime is 1244040247. The reversal of 1244040223 is 3220404421.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1244040223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1244040194 and 1244040203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244040023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1236118 + ... + 1237123.

It is an arithmetic number, because the mean of its divisors is an integer number (311628492).

Almost surely, 2^1244040223 is an apocalyptic number.

1244040223 is a deficient number, since it is larger than the sum of its proper divisors (2473745).

1244040223 is an equidigital number, since it uses as much as digits as its factorization.

1244040223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2473744.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 1244040223 is about 35270.9543817572. The cubic root of 1244040223 is about 1075.5026235846.

Adding to 1244040223 its reverse (3220404421), we get a palindrome (4464444644).

The spelling of 1244040223 in words is "one billion, two hundred forty-four million, forty thousand, two hundred twenty-three".