42289173440 has 112 divisors (see below), whose sum is σ = 105149599200. Its totient is φ = 16179351552.

The previous prime is 42289173419. The next prime is 42289173457. The reversal of 42289173440 is 4437198224.

It is a junction number, because it is equal to n+sod(n) for n = 42289173391 and 42289173400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 971666 + ... + 1014254.

Almost surely, 2^42289173440 is an apocalyptic number.

42289173440 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 42289173440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52574799600).

42289173440 is an abundant number, since it is smaller than the sum of its proper divisors (62860425760).

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

42289173440 is a wasteful number, since it uses less digits than its factorization.

42289173440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42742 (or 42732 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 44.

The spelling of 42289173440 in words is "forty-two billion, two hundred eighty-nine million, one hundred seventy-three thousand, four hundred forty".