28255234600 has 48 divisors (see below), whose sum is σ = 65756533500. Its totient is φ = 11291235840.

The previous prime is 28255234561. The next prime is 28255234607. The reversal of 28255234600 is 643255282.

It can be written as a sum of positive squares in 6 ways, for example, as 22282727076 + 5972507524 = 149274^2 + 77282^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28255234600.

It is not an unprimeable number, because it can be changed into a prime (28255234607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142462 + ... + 277138.

Almost surely, 2^28255234600 is an apocalyptic number.

28255234600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28255234600 is an abundant number, since it is smaller than the sum of its proper divisors (37501298900).

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

28255234600 is a wasteful number, since it uses less digits than its factorization.

28255234600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135742 (or 135733 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 37.

Adding to 28255234600 its reverse (643255282), we get a palindrome (28898489882).

The spelling of 28255234600 in words is "twenty-eight billion, two hundred fifty-five million, two hundred thirty-four thousand, six hundred".