9156805728 has 192 divisors, whose sum is σ = 27941760000. Its totient is φ = 2571761664.

The previous prime is 9156805711. The next prime is 9156805739. The reversal of 9156805728 is 8275086519.

It is a super-2 number, since 2×9156805728² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10913533 + ... + 10914371.

It is an arithmetic number, because the mean of its divisors is an integer number (145530000).

Almost surely, 2^9156805728 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 9156805728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13970880000).

9156805728 is an abundant number, since it is smaller than the sum of its proper divisors (18784954272).

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

9156805728 is a wasteful number, since it uses less digits than its factorization.

9156805728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117 (or 1109 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 51.

The square root of 9156805728 is about 95691.1998461719. The cubic root of 9156805728 is about 2092.0946718438.

The spelling of 9156805728 in words is "nine billion, one hundred fifty-six million, eight hundred five thousand, seven hundred twenty-eight".