28805568 has 112 divisors (see below), whose sum is σ = 86904576. Its totient is φ = 8335360.

The previous prime is 28805561. The next prime is 28805587. The reversal of 28805568 is 86550882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28805561) 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, 48280 + ... + 48872.

Almost surely, 2^28805568 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 28805568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43452288).

28805568 is an abundant number, since it is smaller than the sum of its proper divisors (58099008).

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

28805568 is a wasteful number, since it uses less digits than its factorization.

28805568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 632 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 42.

The square root of 28805568 is about 5367.0818886989. The cubic root of 28805568 is about 306.5435254388.

It can be divided in two parts, 2880 and 5568, that added together give a palindrome (8448).

The spelling of 28805568 in words is "twenty-eight million, eight hundred five thousand, five hundred sixty-eight".