28030050000 has 420 divisors, whose sum is σ = 101907188460. Its totient is φ = 7464960000.

The previous prime is 28030049989. The next prime is 28030050001. The reversal of 28030050000 is 5003082.

It can be written as a sum of positive squares in 6 ways, for example, as 24253701696 + 3776348304 = 155736^2 + 61452^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28030050001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 36449616 + ... + 36450384.

It is an arithmetic number, because the mean of its divisors is an integer number (242636163).

Almost surely, 2^28030050000 is an apocalyptic number.

28030050000 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 28030050000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50953594230).

28030050000 is an abundant number, since it is smaller than the sum of its proper divisors (73877138460).

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

28030050000 is an frugal number, since it uses more digits than its factorization.

28030050000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820 (or 779 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 28030050000 its reverse (5003082), we get a palindrome (28035053082).

The spelling of 28030050000 in words is "twenty-eight billion, thirty million, fifty thousand".