9721040832 has 168 divisors, whose sum is σ = 29955744000. Its totient is φ = 3004328448.

The previous prime is 9721040809. The next prime is 9721040863. The reversal of 9721040832 is 2380401279.

9721040832 is a `hidden beast` number, since 9 + 7 + 210 + 408 + 32 = 666.

It is a super-2 number, since 2×9721040832² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 504919 + ... + 523817.

It is an arithmetic number, because the mean of its divisors is an integer number (178308000).

Almost surely, 2^9721040832 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 9721040832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14977872000).

9721040832 is an abundant number, since it is smaller than the sum of its proper divisors (20234703168).

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

9721040832 is a wasteful number, since it uses less digits than its factorization.

9721040832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18983 (or 18970 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 9721040832 is about 98595.3387944887. The cubic root of 9721040832 is about 2134.2121554561.

The spelling of 9721040832 in words is "nine billion, seven hundred twenty-one million, forty thousand, eight hundred thirty-two".