42443404240 has 20 divisors (see below), whose sum is σ = 98680915044. Its totient is φ = 16977361664.

The previous prime is 42443404219. The next prime is 42443404243. The reversal of 42443404240 is 4240434424.

It can be written as a sum of positive squares in 2 ways, for example, as 18817254976 + 23626149264 = 137176^2 + 153708^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42443404243) 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 3 ways as a sum of consecutive naturals, for example, 265271197 + ... + 265271356.

Almost surely, 2^42443404240 is an apocalyptic number.

42443404240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42443404240 is an abundant number, since it is smaller than the sum of its proper divisors (56237510804).

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

42443404240 is a wasteful number, since it uses less digits than its factorization.

42443404240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530542566 (or 530542560 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 31.

Adding to 42443404240 its reverse (4240434424), we get a palindrome (46683838664).

The spelling of 42443404240 in words is "forty-two billion, four hundred forty-three million, four hundred four thousand, two hundred forty".