28440446568 has 16 divisors (see below), whose sum is σ = 71101116480. Its totient is φ = 9480148848.

The previous prime is 28440446561. The next prime is 28440446579. The reversal of 28440446568 is 86564404482.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28440446568.

It is not an unprimeable number, because it can be changed into a prime (28440446561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592509280 + ... + 592509327.

It is an arithmetic number, because the mean of its divisors is an integer number (4443819780).

Almost surely, 2^28440446568 is an apocalyptic number.

It is an amenable number.

28440446568 is an abundant number, since it is smaller than the sum of its proper divisors (42660669912).

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

28440446568 is a wasteful number, since it uses less digits than its factorization.

28440446568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185018616 (or 1185018612 counting only the distinct ones).

The product of its (nonzero) digits is 5898240, while the sum is 51.

The spelling of 28440446568 in words is "twenty-eight billion, four hundred forty million, four hundred forty-six thousand, five hundred sixty-eight".