28091044800 has 1512 divisors, whose sum is σ = 132174727776. Its totient is φ = 5520752640.

The previous prime is 28091044757. The next prime is 28091044823. The reversal of 28091044800 is 844019082.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 289598352 + ... + 289598448.

It is an arithmetic number, because the mean of its divisors is an integer number (87417148).

Almost surely, 2^28091044800 is an apocalyptic number.

28091044800 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 28091044800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66087363888).

28091044800 is an abundant number, since it is smaller than the sum of its proper divisors (104083682976).

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

28091044800 is a wasteful number, since it uses less digits than its factorization.

28091044800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The spelling of 28091044800 in words is "twenty-eight billion, ninety-one million, forty-four thousand, eight hundred".