9722712528 has 400 divisors, whose sum is σ = 31342755840. Its totient is φ = 2897337600.

The previous prime is 9722712479. The next prime is 9722712533. The reversal of 9722712528 is 8252172279.

9722712528 is a `hidden beast` number, since 97 + 2 + 27 + 12 + 528 = 666.

It is a super-2 number, since 2×9722712528² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 35877033 + ... + 35877303.

Almost surely, 2^9722712528 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 9722712528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15671377920).

9722712528 is an abundant number, since it is smaller than the sum of its proper divisors (21620043312).

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

9722712528 is a wasteful number, since it uses less digits than its factorization.

9722712528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388 (or 373 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 9722712528 is about 98603.8159910660. The cubic root of 9722712528 is about 2134.3344863016.

The spelling of 9722712528 in words is "nine billion, seven hundred twenty-two million, seven hundred twelve thousand, five hundred twenty-eight".