First off, I'd like to emphasize that this is more a curiosity than wanting to recover a very small amount of space.
I created a 10 GiB NTFS partition (split off from what was originally a 1.4 TiB partition). Explorer reports the partition as 10736365568 bytes. This is 1028 KiB short of 10 GiB. What is the 1028 KiB used for?