Forty or 40 is a Numberblock made of 40 blocks. Forty is the second multiple of 5 to be male.
He is voiced by Marcel McCalla.
PBS66Wikia's design looks like 4, has gloves like 10, only with squares instead of stars. Instead of having square eyebrows, he has star eyebrows. He also has green rectangular eyes.
CloudyWithAChanceOfRainbows' design of 40 has 4 light green ten-blocks and darker green eyebrows, lips and limbs. he has a green border with 3 lines to separe the 4 tens. (like PBS66Wikia's design) and like 12 an array display (like the official design).