28211960800 has 72 divisors (see below), whose sum is σ = 68970976200. Its totient is φ = 11268641280.

The previous prime is 28211960789. The next prime is 28211960801. The reversal of 28211960800 is 806911282.

It is a self number, because there is not a number n which added to its sum of digits gives 28211960800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28211960801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 542331 + ... + 592069.

It is an arithmetic number, because the mean of its divisors is an integer number (957930225).

Almost surely, 2^28211960800 is an apocalyptic number.

28211960800 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 28211960800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34485488100).

28211960800 is an abundant number, since it is smaller than the sum of its proper divisors (40759015400).

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

28211960800 is a wasteful number, since it uses less digits than its factorization.

28211960800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50468 (or 50455 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The spelling of 28211960800 in words is "twenty-eight billion, two hundred eleven million, nine hundred sixty thousand, eight hundred".