9856905240 has 256 divisors, whose sum is σ = 36603141120. Its totient is φ = 2067793920.

The previous prime is 9856905239. The next prime is 9856905251. The reversal of 9856905240 is 425096589.

It is a self number, because there is not a number n which added to its sum of digits gives 9856905240.

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, 1974027 + ... + 1979013.

It is an arithmetic number, because the mean of its divisors is an integer number (142981020).

Almost surely, 2^9856905240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9856905240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18301570560).

9856905240 is an abundant number, since it is smaller than the sum of its proper divisors (26746235880).

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

9856905240 is a wasteful number, since it uses less digits than its factorization.

9856905240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5202 (or 5198 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 48.

The square root of 9856905240 is about 99281.9482081209. The cubic root of 9856905240 is about 2144.1090034012.

The spelling of 9856905240 in words is "nine billion, eight hundred fifty-six million, nine hundred five thousand, two hundred forty".