8653729728 has 112 divisors (see below), whose sum is σ = 26225869824. Its totient is φ = 2466954240.

The previous prime is 8653729709. The next prime is 8653729729. The reversal of 8653729728 is 8279273568.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8653729729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 612601 + ... + 626567.

It is an arithmetic number, because the mean of its divisors is an integer number (234159552).

Almost surely, 2^8653729728 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 8653729728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13112934912).

8653729728 is an abundant number, since it is smaller than the sum of its proper divisors (17572140096).

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

8653729728 is a wasteful number, since it uses less digits than its factorization.

8653729728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14450 (or 14440 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 57.

The square root of 8653729728 is about 93025.4251696814. The cubic root of 8653729728 is about 2053.0574822923.

The spelling of 8653729728 in words is "eight billion, six hundred fifty-three million, seven hundred twenty-nine thousand, seven hundred twenty-eight".