28076668568 has 32 divisors (see below), whose sum is σ = 56777157360. Its totient is φ = 12939288960.

The previous prime is 28076668559. The next prime is 28076668573. The reversal of 28076668568 is 86586667082.

It is a self number, because there is not a number n which added to its sum of digits gives 28076668568.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128978 + ... + 269793.

Almost surely, 2^28076668568 is an apocalyptic number.

It is an amenable number.

28076668568 is an abundant number, since it is smaller than the sum of its proper divisors (28700488792).

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

28076668568 is a wasteful number, since it uses less digits than its factorization.

28076668568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399467 (or 399463 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 62.

The spelling of 28076668568 in words is "twenty-eight billion, seventy-six million, six hundred sixty-eight thousand, five hundred sixty-eight".