9917859940 has 24 divisors (see below), whose sum is σ = 20832561792. Its totient is φ = 3966180960.

The previous prime is 9917859929. The next prime is 9917859983. The reversal of 9917859940 is 499587199.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27367 + ... + 143473.

It is an arithmetic number, because the mean of its divisors is an integer number (868023408).

Almost surely, 2^9917859940 is an apocalyptic number.

It is an amenable number.

9917859940 is an abundant number, since it is smaller than the sum of its proper divisors (10914701852).

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

9917859940 is a wasteful number, since it uses less digits than its factorization.

9917859940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120387 (or 120385 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 61.

The square root of 9917859940 is about 99588.4528446948. The cubic root of 9917859940 is about 2148.5196183795.

The spelling of 9917859940 in words is "nine billion, nine hundred seventeen million, eight hundred fifty-nine thousand, nine hundred forty".