28361280000 has 400 divisors, whose sum is σ = 97562969856. Its totient is φ = 7311360000.

The previous prime is 28361279977. The next prime is 28361280019. The reversal of 28361280000 is 8216382.

It is a tau number, because it is divible by the number of its divisors (400).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 28361280000.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 29759524 + ... + 29760476.

Almost surely, 2^28361280000 is an apocalyptic number.

28361280000 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 28361280000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48781484928).

28361280000 is an abundant number, since it is smaller than the sum of its proper divisors (69201689856).

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

28361280000 is an frugal number, since it uses more digits than its factorization.

28361280000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025 (or 994 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

Adding to 28361280000 its reverse (8216382), we get a palindrome (28369496382).

The spelling of 28361280000 in words is "twenty-eight billion, three hundred sixty-one million, two hundred eighty thousand".