9728453688 has 16 divisors (see below), whose sum is σ = 24321134280. Its totient is φ = 3242817888.

The previous prime is 9728453671. The next prime is 9728453699. The reversal of 9728453688 is 8863548279.

It is a super-2 number, since 2×9728453688² (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 3 ways as a sum of consecutive naturals, for example, 202676095 + ... + 202676142.

Almost surely, 2^9728453688 is an apocalyptic number.

It is an amenable number.

9728453688 is an abundant number, since it is smaller than the sum of its proper divisors (14592680592).

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

9728453688 is a wasteful number, since it uses less digits than its factorization.

9728453688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405352246 (or 405352242 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 60.

The square root of 9728453688 is about 98632.9239554420. The cubic root of 9728453688 is about 2134.7545043665.

The spelling of 9728453688 in words is "nine billion, seven hundred twenty-eight million, four hundred fifty-three thousand, six hundred eighty-eight".