442040423444 has 24 divisors (see below), whose sum is σ = 788993813160. Its totient is φ = 216622375424.

The previous prime is 442040423443. The next prime is 442040423449. The reversal of 442040423444 is 444324040244.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 229115395600 + 212925027844 = 478660^2 + 461438^2 .

It is a super-3 number, since 3×442040423444³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442040423443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 891929 + ... + 1296000.

It is an arithmetic number, because the mean of its divisors is an integer number (32874742215).

Almost surely, 2^442040423444 is an apocalyptic number.

It is an amenable number.

442040423444 is a deficient number, since it is larger than the sum of its proper divisors (346953389716).

442040423444 is a wasteful number, since it uses less digits than its factorization.

442040423444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188939 (or 2188937 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 35.

Adding to 442040423444 its reverse (444324040244), we get a palindrome (886364463688).

The spelling of 442040423444 in words is "four hundred forty-two billion, forty million, four hundred twenty-three thousand, four hundred forty-four".