9664728 has 16 divisors (see below), whose sum is σ = 24161880. Its totient is φ = 3221568.

The previous prime is 9664727. The next prime is 9664729. The reversal of 9664728 is 8274669.

9664728 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9664727) and next prime (9664729).

It is a self number, because there is not a number n which added to its sum of digits gives 9664728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9664727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201325 + ... + 201372.

Almost surely, 2^9664728 is an apocalyptic number.

It is an amenable number.

9664728 is an abundant number, since it is smaller than the sum of its proper divisors (14497152).

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

9664728 is a wasteful number, since it uses less digits than its factorization.

9664728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402706 (or 402702 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 9664728 is about 3108.8145650714. The cubic root of 9664728 is about 213.0083093146.

The spelling of 9664728 in words is "nine million, six hundred sixty-four thousand, seven hundred twenty-eight".