28505305300 has 36 divisors (see below), whose sum is σ = 64545931296. Its totient is φ = 10906376800.

The previous prime is 28505305291. The next prime is 28505305331. The reversal of 28505305300 is 350350582.

It is a congruent number.

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, 6194506 + ... + 6199105.

It is an arithmetic number, because the mean of its divisors is an integer number (1792942536).

Almost surely, 2^28505305300 is an apocalyptic number.

28505305300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28505305300 is an abundant number, since it is smaller than the sum of its proper divisors (36040625996).

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

28505305300 is a wasteful number, since it uses less digits than its factorization.

28505305300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12393648 (or 12393641 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 28505305300 its reverse (350350582), we get a palindrome (28855655882).

The spelling of 28505305300 in words is "twenty-eight billion, five hundred five million, three hundred five thousand, three hundred".