28044574900 has 18 divisors (see below), whose sum is σ = 60856727750. Its totient is φ = 11217829920.

The previous prime is 28044574897. The next prime is 28044574933. The reversal of 28044574900 is 947544082.

It can be written as a sum of positive squares in 3 ways, for example, as 26501904 + 28018072996 = 5148^2 + 167386^2 .

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, 140222775 + ... + 140222974.

Almost surely, 2^28044574900 is an apocalyptic number.

28044574900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28044574900 is an abundant number, since it is smaller than the sum of its proper divisors (32812152850).

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

28044574900 is a wasteful number, since it uses less digits than its factorization.

28044574900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280445763 (or 280445756 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 28044574900 in words is "twenty-eight billion, forty-four million, five hundred seventy-four thousand, nine hundred".