28205956700 has 18 divisors (see below), whose sum is σ = 61206926256. Its totient is φ = 11282382640.

The previous prime is 28205956693. The next prime is 28205956711. The reversal of 28205956700 is 765950282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 141029684 + ... + 141029883.

It is an arithmetic number, because the mean of its divisors is an integer number (3400384792).

Almost surely, 2^28205956700 is an apocalyptic number.

28205956700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28205956700 is an abundant number, since it is smaller than the sum of its proper divisors (33000969556).

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

28205956700 is a wasteful number, since it uses less digits than its factorization.

28205956700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282059581 (or 282059574 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 28205956700 in words is "twenty-eight billion, two hundred five million, nine hundred fifty-six thousand, seven hundred".