28005305300 has 72 divisors (see below), whose sum is σ = 73538668224. Its totient is φ = 9037002240.

The previous prime is 28005305299. The next prime is 28005305327. The reversal of 28005305300 is 350350082.

It is a super-3 number, since 3×28005305300³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28005305300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1164794 + ... + 1188593.

It is an arithmetic number, because the mean of its divisors is an integer number (1021370392).

Almost surely, 2^28005305300 is an apocalyptic number.

28005305300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28005305300 is an abundant number, since it is smaller than the sum of its proper divisors (45533362924).

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

28005305300 is a wasteful number, since it uses less digits than its factorization.

28005305300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2353425 (or 2353418 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 28005305300 its reverse (350350082), we get a palindrome (28355655382).

The spelling of 28005305300 in words is "twenty-eight billion, five million, three hundred five thousand, three hundred".