9800645920 has 192 divisors, whose sum is σ = 26138246400. Its totient is φ = 3445567488.

The previous prime is 9800645917. The next prime is 9800645929. The reversal of 9800645920 is 295460089.

It is not an unprimeable number, because it can be changed into a prime (9800645929) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16695867 + ... + 16696453.

It is an arithmetic number, because the mean of its divisors is an integer number (136136700).

Almost surely, 2^9800645920 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 9800645920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13069123200).

9800645920 is an abundant number, since it is smaller than the sum of its proper divisors (16337600480).

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

9800645920 is a wasteful number, since it uses less digits than its factorization.

9800645920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987 (or 979 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 9800645920 is about 98998.2117010201. The cubic root of 9800645920 is about 2140.0219754927.

The spelling of 9800645920 in words is "nine billion, eight hundred million, six hundred forty-five thousand, nine hundred twenty".