9689127728 has 20 divisors (see below), whose sum is σ = 21454497360. Its totient is φ = 4152483264.

The previous prime is 9689127719. The next prime is 9689127733. The reversal of 9689127728 is 8277219869.

It is a super-2 number, since 2×9689127728² (a number of 21 digits) contains 22 as substring.

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, 43254923 + ... + 43255146.

It is an arithmetic number, because the mean of its divisors is an integer number (1072724868).

Almost surely, 2^9689127728 is an apocalyptic number.

It is an amenable number.

9689127728 is an abundant number, since it is smaller than the sum of its proper divisors (11765369632).

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

9689127728 is a wasteful number, since it uses less digits than its factorization.

9689127728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86510084 (or 86510078 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 59.

The square root of 9689127728 is about 98433.3669443446. The cubic root of 9689127728 is about 2131.8741341237.

The spelling of 9689127728 in words is "nine billion, six hundred eighty-nine million, one hundred twenty-seven thousand, seven hundred twenty-eight".