28208027968 has 28 divisors (see below), whose sum is σ = 56892941332. Its totient is φ = 13872798720.

The previous prime is 28208027963. The next prime is 28208027983. The reversal of 28208027968 is 86972080282.

It can be written as a sum of positive squares in 2 ways, for example, as 940771584 + 27267256384 = 30672^2 + 165128^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28208027963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3608805 + ... + 3616612.

Almost surely, 2^28208027968 is an apocalyptic number.

It is an amenable number.

28208027968 is an abundant number, since it is smaller than the sum of its proper divisors (28684913364).

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

28208027968 is an equidigital number, since it uses as much as digits as its factorization.

28208027968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7225490 (or 7225480 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 52.

The spelling of 28208027968 in words is "twenty-eight billion, two hundred eight million, twenty-seven thousand, nine hundred sixty-eight".