28501200000 has 1536 divisors, whose sum is σ = 133866432000. Its totient is φ = 5806080000.

The previous prime is 28501199989. The next prime is 28501200001. The reversal of 28501200000 is 210582.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (28501200001) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 982799986 + ... + 982800014.

It is an arithmetic number, because the mean of its divisors is an integer number (87152625).

Almost surely, 2^28501200000 is an apocalyptic number.

28501200000 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 28501200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66933216000).

28501200000 is an abundant number, since it is smaller than the sum of its proper divisors (105365232000).

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

28501200000 is an equidigital number, since it uses as much as digits as its factorization.

28501200000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

Adding to 28501200000 its reverse (210582), we get a palindrome (28501410582).

The spelling of 28501200000 in words is "twenty-eight billion, five hundred one million, two hundred thousand".