9850982778 has 128 divisors (see below), whose sum is σ = 27812413440. Its totient is φ = 2514214080.

The previous prime is 9850982773. The next prime is 9850982819. The reversal of 9850982778 is 8772890589.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (9850982773) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 120001 + ... + 184667.

It is an arithmetic number, because the mean of its divisors is an integer number (217284480).

Almost surely, 2^9850982778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9850982778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13906206720).

9850982778 is an abundant number, since it is smaller than the sum of its proper divisors (17961430662).

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

9850982778 is a wasteful number, since it uses less digits than its factorization.

9850982778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64729 (or 64723 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 63.

The square root of 9850982778 is about 99252.1172469384. The cubic root of 9850982778 is about 2143.6794923836.

The spelling of 9850982778 in words is "nine billion, eight hundred fifty million, nine hundred eighty-two thousand, seven hundred seventy-eight".