42991960440 has 256 divisors, whose sum is σ = 159500275200. Its totient is φ = 9114163200.

The previous prime is 42991960393. The next prime is 42991960481. The reversal of 42991960440 is 4406919924.

It is a self number, because there is not a number n which added to its sum of digits gives 42991960440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 260110 + ... + 391970.

It is an arithmetic number, because the mean of its divisors is an integer number (623047950).

Almost surely, 2^42991960440 is an apocalyptic number.

42991960440 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 42991960440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79750137600).

42991960440 is an abundant number, since it is smaller than the sum of its proper divisors (116508314760).

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

42991960440 is a wasteful number, since it uses less digits than its factorization.

42991960440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131918 (or 131914 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 48.

The spelling of 42991960440 in words is "forty-two billion, nine hundred ninety-one million, nine hundred sixty thousand, four hundred forty".