9728918580 has 192 divisors, whose sum is σ = 29095557120. Its totient is φ = 2423748096.

The previous prime is 9728918569. The next prime is 9728918581. The reversal of 9728918580 is 858198279.

It is a self number, because there is not a number n which added to its sum of digits gives 9728918580.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9728918581) 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, 12851562 + ... + 12852318.

It is an arithmetic number, because the mean of its divisors is an integer number (151539360).

Almost surely, 2^9728918580 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 9728918580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14547778560).

9728918580 is an abundant number, since it is smaller than the sum of its proper divisors (19366638540).

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

9728918580 is a wasteful number, since it uses less digits than its factorization.

9728918580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998 (or 996 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 57.

The square root of 9728918580 is about 98635.2806048627. The cubic root of 9728918580 is about 2134.7885082111.

The spelling of 9728918580 in words is "nine billion, seven hundred twenty-eight million, nine hundred eighteen thousand, five hundred eighty".