28208808800 has 72 divisors (see below), whose sum is σ = 68906980296. Its totient is φ = 11276605440.

The previous prime is 28208808721. The next prime is 28208808853. The reversal of 28208808800 is 880880282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1411679 + ... + 1431521.

It is an arithmetic number, because the mean of its divisors is an integer number (957041393).

Almost surely, 2^28208808800 is an apocalyptic number.

28208808800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28208808800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34453490148).

28208808800 is an abundant number, since it is smaller than the sum of its proper divisors (40698171496).

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

28208808800 is a wasteful number, since it uses less digits than its factorization.

28208808800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21640 (or 21627 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 44.

The spelling of 28208808800 in words is "twenty-eight billion, two hundred eight million, eight hundred eight thousand, eight hundred".