442220443444 has 12 divisors (see below), whose sum is σ = 833415451204. Its totient is φ = 204101743104.

The previous prime is 442220443433. The next prime is 442220443447. The reversal of 442220443444 is 444344022244.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 160631020944 + 281589422500 = 400788^2 + 530650^2 .

It is a super-2 number, since 2×442220443444² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442220443447) 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, 4252119597 + ... + 4252119700.

Almost surely, 2^442220443444 is an apocalyptic number.

It is an amenable number.

442220443444 is a deficient number, since it is larger than the sum of its proper divisors (391195007760).

442220443444 is a wasteful number, since it uses less digits than its factorization.

442220443444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8504239314 (or 8504239312 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 37.

Adding to 442220443444 its reverse (444344022244), we get a palindrome (886564465688).

The spelling of 442220443444 in words is "four hundred forty-two billion, two hundred twenty million, four hundred forty-three thousand, four hundred forty-four".