42120443440 has 40 divisors (see below), whose sum is σ = 98141629248. Its totient is φ = 16811773440.

The previous prime is 42120443399. The next prime is 42120443441. The reversal of 42120443440 is 4434402124.

42120443440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 42120443399 and 42120443408.

It is not an unprimeable number, because it can be changed into a prime (42120443441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 531541 + ... + 605620.

Almost surely, 2^42120443440 is an apocalyptic number.

42120443440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42120443440 is an abundant number, since it is smaller than the sum of its proper divisors (56021185808).

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

42120443440 is a wasteful number, since it uses less digits than its factorization.

42120443440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137637 (or 1137631 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 42120443440 its reverse (4434402124), we get a palindrome (46554845564).

The spelling of 42120443440 in words is "forty-two billion, one hundred twenty million, four hundred forty-three thousand, four hundred forty".