28608434688 has 80 divisors (see below), whose sum is σ = 77133250656. Its totient is φ = 9421209600.

The previous prime is 28608434651. The next prime is 28608434689. The reversal of 28608434688 is 88643480682.

It is not an unprimeable number, because it can be changed into a prime (28608434689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15288 + ... + 239688.

Almost surely, 2^28608434688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28608434688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38566625328).

28608434688 is an abundant number, since it is smaller than the sum of its proper divisors (48524815968).

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

28608434688 is an equidigital number, since it uses as much as digits as its factorization.

28608434688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224505 (or 224489 counting only the distinct ones).

The product of its (nonzero) digits is 14155776, while the sum is 57.

The spelling of 28608434688 in words is "twenty-eight billion, six hundred eight million, four hundred thirty-four thousand, six hundred eighty-eight".