28315853568 has 108 divisors (see below), whose sum is σ = 81759918240. Its totient is φ = 9424939008.

The previous prime is 28315853563. The next prime is 28315853593. The reversal of 28315853568 is 86535851382.

It is a happy number.

28315853568 is a `hidden beast` number, since 2 + 8 + 3 + 1 + 585 + 3 + 56 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (28315853563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1648030 + ... + 1665122.

It is an arithmetic number, because the mean of its divisors is an integer number (757036280).

Almost surely, 2^28315853568 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 28315853568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40879959120).

28315853568 is an abundant number, since it is smaller than the sum of its proper divisors (53444064672).

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

28315853568 is a wasteful number, since it uses less digits than its factorization.

28315853568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17834 (or 17817 counting only the distinct ones).

The product of its digits is 6912000, while the sum is 54.

The spelling of 28315853568 in words is "twenty-eight billion, three hundred fifteen million, eight hundred fifty-three thousand, five hundred sixty-eight".