CONVERT(int, COLUMNS_UPDATED() ) does not work

columns_updated is 0xF2FF03

the int value is 15924995

the bin value is 11110010 11111111 00000011

F2 FF 03

But in fact i'm expecting

int -> 262130

bin -> 00000011 11111111 11110010

03 FF F2

if this case the updated columns are in position (non-zero based)

2, 5-18

00000000 00000000 00000010 [2]

00000000 00000000 00010000 [5]

00000000 00000000 00100000 [6]

...

00000001 00000000 00000000 [17]

00000010 00000000 00000000 [18]