28066300900 has 81 divisors (see below), whose sum is σ = 66987910633. Its totient is φ = 10199226400.

The previous prime is 28066300877. The next prime is 28066300931. The reversal of 28066300900 is 900366082.

It is a happy number.

The square root of 28066300900 is 167530.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 10103868324 + 17962432576 = 100518^2 + 134024^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 18427539 + ... + 18429061.

Almost surely, 2^28066300900 is an apocalyptic number.

28066300900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

28066300900 is the 167530-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28066300900

28066300900 is an abundant number, since it is smaller than the sum of its proper divisors (38921609733).

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

28066300900 is a wasteful number, since it uses less digits than its factorization.

28066300900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3082 (or 1541 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

Adding to 28066300900 its reverse (900366082), we get a palindrome (28966666982).

The spelling of 28066300900 in words is "twenty-eight billion, sixty-six million, three hundred thousand, nine hundred".