28651284112 has 60 divisors (see below), whose sum is σ = 61853328460. Its totient is φ = 12844846080.

The previous prime is 28651284091. The next prime is 28651284127. The reversal of 28651284112 is 21148215682.

It can be written as a sum of positive squares in 2 ways, for example, as 23029883536 + 5621400576 = 151756^2 + 74976^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39964 + ... + 242692.

Almost surely, 2^28651284112 is an apocalyptic number.

28651284112 is a gapful number since it is divisible by the number (22) 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 28651284112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30926664230).

28651284112 is an abundant number, since it is smaller than the sum of its proper divisors (33202044348).

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

28651284112 is a wasteful number, since it uses less digits than its factorization.

28651284112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202832 (or 202815 counting only the distinct ones).

The product of its digits is 61440, while the sum is 40.

Adding to 28651284112 its reverse (21148215682), we get a palindrome (49799499794).

The spelling of 28651284112 in words is "twenty-eight billion, six hundred fifty-one million, two hundred eighty-four thousand, one hundred twelve".