28664840608 has 12 divisors (see below), whose sum is σ = 56433905010. Its totient is φ = 14332420288.

The previous prime is 28664840563. The next prime is 28664840609. The reversal of 28664840608 is 80604846682.

It can be written as a sum of positive squares in only one way, i.e., 28219968144 + 444872464 = 167988^2 + 21092^2 .

It is not an unprimeable number, because it can be changed into a prime (28664840609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 447888103 + ... + 447888166.

Almost surely, 2^28664840608 is an apocalyptic number.

It is an amenable number.

28664840608 is a deficient number, since it is larger than the sum of its proper divisors (27769064402).

28664840608 is an equidigital number, since it uses as much as digits as its factorization.

28664840608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895776279 (or 895776271 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 52.

The spelling of 28664840608 in words is "twenty-eight billion, six hundred sixty-four million, eight hundred forty thousand, six hundred eight".