Why is the volume of the disk in the characteristics less than indicated in mbr?

Question

Hard disks

There is a usb flash drive. Its real volume from the manufacturer, I do not know.
In the Aomie Assistant and Disk Manager programs, the volume of the entire flash drive is indicated as 481.75 megabytes. And the volume of its only section is 478.47 mb. At the same time, it is written that it has the characteristics of CHS 61 255 63 with a sector size of 512 and a total of 986622 sectors.
The fact is that if you calculate then 986622 * 512 you get 505150464 bytes ~ 501.70 MB.
But even if we assume that the data is not correct, in the MBR table on the flash drive, the address of the last sector of a single partition is indicated as 501741568, that is, it is already more than 481 MB. Why does the data diverge?

Aomi disk options:


In disk manager:


Data from the MBR table:

CHS start: 010100  CHS end: fe3f3c  LBA start: 63
Partition #0  Boot: False  Fs: fat32
First sector begins at: 0x7e00 32256
Last sector ends at: 0x1de7f800 501741568

CHS start: 000000  CHS end: 000000  LBA start: 0
Partition #1  Boot: False  Fs: free
First sector begins at: -0x200 -512
Last sector ends at: -0x200 -512

CHS start: 000000  CHS end: 000000  LBA start: 0
Partition #2  Boot: False  Fs: free
First sector begins at: -0x200 -512
Last sector ends at: -0x200 -512

CHS start: 000000  CHS end: 000000  LBA start: 0
Partition #3  Boot: False  Fs: free
First sector begins at: -0x200 -512
Last sector ends at: -0x200 -512