Hey, MC Hammer is not ancient!
U Can't Touch This is only, like, 27 years old, oops.
When my sim aged up to an adult, he had $526,840 and 70 unique upgrades.
$526,840 x 2.40 = $1,264,416
@simemie The same thing you experienced happened to me. I got an "Almost birthday" message on Thursday at 8am and thought, "Okay, I have until Saturday 8am."
But my sim aged up around 8pm on Friday, just like your sim. I guess it's a short lifespan thing.