42043043440 has 80 divisors (see below), whose sum is σ = 103056261120. Its totient is φ = 15907104000.

The previous prime is 42043043431. The next prime is 42043043443. The reversal of 42043043440 is 4434034024.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 42043043399 and 42043043408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42043043443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 962065 + ... + 1004815.

It is an arithmetic number, because the mean of its divisors is an integer number (1288203264).

Almost surely, 2^42043043440 is an apocalyptic number.

42043043440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42043043440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51528130560).

42043043440 is an abundant number, since it is smaller than the sum of its proper divisors (61013217680).

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

42043043440 is a wasteful number, since it uses less digits than its factorization.

42043043440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43430 (or 43424 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 42043043440 its reverse (4434034024), we get a palindrome (46477077464).

The spelling of 42043043440 in words is "forty-two billion, forty-three million, forty-three thousand, four hundred forty".