28508811300 has 288 divisors, whose sum is σ = 98881171200. Its totient is φ = 7019550720.

The previous prime is 28508811293. The next prime is 28508811313. The reversal of 28508811300 is 311880582.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2426841 + ... + 2438559.

It is an arithmetic number, because the mean of its divisors is an integer number (343337400).

Almost surely, 2^28508811300 is an apocalyptic number.

28508811300 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 28508811300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49440585600).

28508811300 is an abundant number, since it is smaller than the sum of its proper divisors (70372359900).

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

28508811300 is a wasteful number, since it uses less digits than its factorization.

28508811300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11812 (or 11799 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The spelling of 28508811300 in words is "twenty-eight billion, five hundred eight million, eight hundred eleven thousand, three hundred".