9721768 has 32 divisors (see below), whose sum is σ = 21931200. Its totient is φ = 3946752.

The previous prime is 9721763. The next prime is 9721771. The reversal of 9721768 is 8671279.

It is a self number, because there is not a number n which added to its sum of digits gives 9721768.

It is not an unprimeable number, because it can be changed into a prime (9721763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3505 + ... + 5632.

It is an arithmetic number, because the mean of its divisors is an integer number (685350).

Almost surely, 2^9721768 is an apocalyptic number.

It is an amenable number.

9721768 is an abundant number, since it is smaller than the sum of its proper divisors (12209432).

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

9721768 is a wasteful number, since it uses less digits than its factorization.

9721768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9169 (or 9165 counting only the distinct ones).

The product of its digits is 42336, while the sum is 40.

The square root of 9721768 is about 3117.9749838637. The cubic root of 9721768 is about 213.4265369651.

The spelling of 9721768 in words is "nine million, seven hundred twenty-one thousand, seven hundred sixty-eight".