28745544912 has 40 divisors (see below), whose sum is σ = 84867800256. Its totient is φ = 8213012736.

The previous prime is 28745544911. The next prime is 28745544941. The reversal of 28745544912 is 21944554782.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28745544911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42775773 + ... + 42776444.

Almost surely, 2^28745544912 is an apocalyptic number.

It is an amenable number.

28745544912 is an abundant number, since it is smaller than the sum of its proper divisors (56122255344).

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

28745544912 is a wasteful number, since it uses less digits than its factorization.

28745544912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85552235 (or 85552229 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 51.

The spelling of 28745544912 in words is "twenty-eight billion, seven hundred forty-five million, five hundred forty-four thousand, nine hundred twelve".