28077112428 has 12 divisors (see below), whose sum is σ = 65513262360. Its totient is φ = 9359037472.

The previous prime is 28077112417. The next prime is 28077112447. The reversal of 28077112428 is 82421177082.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 28077112428.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1169879673 + ... + 1169879696.

It is an arithmetic number, because the mean of its divisors is an integer number (5459438530).

Almost surely, 2^28077112428 is an apocalyptic number.

It is an amenable number.

28077112428 is an abundant number, since it is smaller than the sum of its proper divisors (37436149932).

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

28077112428 is a wasteful number, since it uses less digits than its factorization.

28077112428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2339759376 (or 2339759374 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 42.

The spelling of 28077112428 in words is "twenty-eight billion, seventy-seven million, one hundred twelve thousand, four hundred twenty-eight".