9805865440 has 96 divisors (see below), whose sum is σ = 27329992704. Its totient is φ = 3253547520.

The previous prime is 9805865423. The next prime is 9805865507. The reversal of 9805865440 is 445685089.

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, 106494 + ... + 175933.

It is an arithmetic number, because the mean of its divisors is an integer number (284687424).

Almost surely, 2^9805865440 is an apocalyptic number.

It is an amenable number.

9805865440 is an abundant number, since it is smaller than the sum of its proper divisors (17524127264).

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

9805865440 is a wasteful number, since it uses less digits than its factorization.

9805865440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282480 (or 282472 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 49.

The square root of 9805865440 is about 99024.5698804090. The cubic root of 9805865440 is about 2140.4018111780.

The spelling of 9805865440 in words is "nine billion, eight hundred five million, eight hundred sixty-five thousand, four hundred forty".