28776527568 has 240 divisors, whose sum is σ = 83833491456. Its totient is φ = 9209303040.

The previous prime is 28776527567. The next prime is 28776527581. The reversal of 28776527568 is 86572567782.

28776527568 is a `hidden beast` number, since 2 + 8 + 7 + 7 + 65 + 2 + 7 + 568 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28776527561) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 146073646 + ... + 146073842.

Almost surely, 2^28776527568 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 28776527568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41916745728).

28776527568 is an abundant number, since it is smaller than the sum of its proper divisors (55056963888).

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

28776527568 is a wasteful number, since it uses less digits than its factorization.

28776527568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562 (or 553 counting only the distinct ones).

The product of its digits is 79027200, while the sum is 63.

The spelling of 28776527568 in words is "twenty-eight billion, seven hundred seventy-six million, five hundred twenty-seven thousand, five hundred sixty-eight".