28128848068 has 6 divisors (see below), whose sum is σ = 49225484126. Its totient is φ = 14064424032.

The previous prime is 28128848047. The next prime is 28128848081. The reversal of 28128848068 is 86084882182.

It can be written as a sum of positive squares in only one way, i.e., 27899689024 + 229159044 = 167032^2 + 15138^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3516106005 + ... + 3516106012.

Almost surely, 2^28128848068 is an apocalyptic number.

It is an amenable number.

28128848068 is a deficient number, since it is larger than the sum of its proper divisors (21096636058).

28128848068 is a wasteful number, since it uses less digits than its factorization.

28128848068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7032212021 (or 7032212019 counting only the distinct ones).

The product of its (nonzero) digits is 3145728, while the sum is 55.

The spelling of 28128848068 in words is "twenty-eight billion, one hundred twenty-eight million, eight hundred forty-eight thousand, sixty-eight".