42440424440 has 32 divisors (see below), whose sum is σ = 96187981680. Its totient is φ = 16852253952.

The previous prime is 42440424437. The next prime is 42440424479. The reversal of 42440424440 is 4442404424.

It is a junction number, because it is equal to n+sod(n) for n = 42440424397 and 42440424406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3866822 + ... + 3877781.

Almost surely, 2^42440424440 is an apocalyptic number.

42440424440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42440424440 is an abundant number, since it is smaller than the sum of its proper divisors (53747557240).

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

42440424440 is a wasteful number, since it uses less digits than its factorization.

42440424440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7744751 (or 7744747 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 32.

Adding to 42440424440 its reverse (4442404424), we get a palindrome (46882828864).

It can be divided in two parts, 424404 and 24440, that added together give a palindrome (448844).

The spelling of 42440424440 in words is "forty-two billion, four hundred forty million, four hundred twenty-four thousand, four hundred forty".