9928895280 has 80 divisors (see below), whose sum is σ = 30851311104. Its totient is φ = 2641534720.

The previous prime is 9928895267. The next prime is 9928895287. The reversal of 9928895280 is 825988299.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×9928895280² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (9928895287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55447 + ... + 151433.

Almost surely, 2^9928895280 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 9928895280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15425655552).

9928895280 is an abundant number, since it is smaller than the sum of its proper divisors (20922415824).

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

9928895280 is a wasteful number, since it uses less digits than its factorization.

9928895280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96434 (or 96428 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 60.

The square root of 9928895280 is about 99643.8421579578. The cubic root of 9928895280 is about 2149.3161899639.

The spelling of 9928895280 in words is "nine billion, nine hundred twenty-eight million, eight hundred ninety-five thousand, two hundred eighty".