28869820688 has 80 divisors (see below), whose sum is σ = 60102653184. Its totient is φ = 13410155520.

The previous prime is 28869820687. The next prime is 28869820691. The reversal of 28869820688 is 88602896882.

It is not an unprimeable number, because it can be changed into a prime (28869820687) 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 15 ways as a sum of consecutive naturals, for example, 1128131 + ... + 1153437.

Almost surely, 2^28869820688 is an apocalyptic number.

It is an amenable number.

28869820688 is an abundant number, since it is smaller than the sum of its proper divisors (31232832496).

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

28869820688 is a wasteful number, since it uses less digits than its factorization.

28869820688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25440 (or 25434 counting only the distinct ones).

The product of its (nonzero) digits is 42467328, while the sum is 65.

The spelling of 28869820688 in words is "twenty-eight billion, eight hundred sixty-nine million, eight hundred twenty thousand, six hundred eighty-eight".