Fatto matematico: 2638 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 2638 is a boring number.
Data storica: March 22nd is the day in 1993 that the Intel Corporation ships the first Pentium chips (80586), featuring a 60 MHz clock speed, 100+ MIPS, and a 64 bit data path.