9159913728 has 432 divisors, whose sum is σ = 32150321280. Its totient is φ = 2519838720.

The previous prime is 9159913723. The next prime is 9159913729. The reversal of 9159913728 is 8273199519.

It is a tau number, because it is divible by the number of its divisors (432).

It is a Harshad number since it is a multiple of its sum of digits (54).

Its product of digits (1224720) is a multiple of the sum of its prime divisors (240).

It is not an unprimeable number, because it can be changed into a prime (9159913723) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46496926 + ... + 46497122.

It is an arithmetic number, because the mean of its divisors is an integer number (74422040).

Almost surely, 2^9159913728 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 9159913728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16075160640).

9159913728 is an abundant number, since it is smaller than the sum of its proper divisors (22990407552).

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

9159913728 is a wasteful number, since it uses less digits than its factorization.

9159913728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 240 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The square root of 9159913728 is about 95707.4382062335. The cubic root of 9159913728 is about 2092.3313444314.

The spelling of 9159913728 in words is "nine billion, one hundred fifty-nine million, nine hundred thirteen thousand, seven hundred twenty-eight".