9728959896 has 112 divisors (see below), whose sum is σ = 28232976960. Its totient is φ = 3138315840.

The previous prime is 9728959871. The next prime is 9728959897. The reversal of 9728959896 is 6989598279.

It is a happy number.

9728959896 is a `hidden beast` number, since 9 + 7 + 28 + 9 + 598 + 9 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9728959897) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 153886 + ... + 207698.

Almost surely, 2^9728959896 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 9728959896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14116488480).

9728959896 is an abundant number, since it is smaller than the sum of its proper divisors (18504017064).

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

9728959896 is a wasteful number, since it uses less digits than its factorization.

9728959896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53868 (or 53849 counting only the distinct ones).

The product of its digits is 176359680, while the sum is 72.

The square root of 9728959896 is about 98635.4900428847. The cubic root of 9728959896 is about 2134.7915301570.

The spelling of 9728959896 in words is "nine billion, seven hundred twenty-eight million, nine hundred fifty-nine thousand, eight hundred ninety-six".