28200211912 has 8 divisors (see below), whose sum is σ = 52875397350. Its totient is φ = 14100105952.

The previous prime is 28200211909. The next prime is 28200211913. The reversal of 28200211912 is 21911200282.

It can be written as a sum of positive squares in only one way, i.e., 26362717956 + 1837493956 = 162366^2 + 42866^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (28200211913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1762513237 + ... + 1762513252.

Almost surely, 2^28200211912 is an apocalyptic number.

It is an amenable number.

28200211912 is a deficient number, since it is larger than the sum of its proper divisors (24675185438).

28200211912 is a wasteful number, since it uses less digits than its factorization.

28200211912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3525026495 (or 3525026491 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The spelling of 28200211912 in words is "twenty-eight billion, two hundred million, two hundred eleven thousand, nine hundred twelve".