1244220444 has 18 divisors (see below), whose sum is σ = 3145112880. Its totient is φ = 414740136.

The previous prime is 1244220427. The next prime is 1244220449. The reversal of 1244220444 is 4440224421.

1244220444 is a `hidden beast` number, since 12 + 442 + 204 + 4 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244220449) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17280804 + ... + 17280875.

Almost surely, 2^1244220444 is an apocalyptic number.

It is an amenable number.

1244220444 is an abundant number, since it is smaller than the sum of its proper divisors (1900892436).

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

1244220444 is a wasteful number, since it uses less digits than its factorization.

1244220444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34561689 (or 34561684 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 27.

The square root of 1244220444 is about 35273.5090967712. The cubic root of 1244220444 is about 1075.5545562032.

Adding to 1244220444 its reverse (4440224421), we get a palindrome (5684444865).

The spelling of 1244220444 in words is "one billion, two hundred forty-four million, two hundred twenty thousand, four hundred forty-four".