28791091200 has 624 divisors, whose sum is σ = 104209178400. Its totient is φ = 6983516160.

The previous prime is 28791091177. The next prime is 28791091207. The reversal of 28791091200 is 219019782.

It is not an unprimeable number, because it can be changed into a prime (28791091207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 193228726 + ... + 193228874.

Almost surely, 2^28791091200 is an apocalyptic number.

28791091200 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 28791091200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52104589200).

28791091200 is an abundant number, since it is smaller than the sum of its proper divisors (75418087200).

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

28791091200 is a wasteful number, since it uses less digits than its factorization.

28791091200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 39.

The spelling of 28791091200 in words is "twenty-eight billion, seven hundred ninety-one million, ninety-one thousand, two hundred".