Two important math errors here, first you have assumed SAT scores follow a uniform distribution (they do not) and second you have used the wrong range of possible scores.
The top 1% of possible scores are between 2400 and 2382 (2400-18), not 2376 (2400-24), because the minimum possible score is 600 and therefore the range of possible scores are spread over 1800 points, not 2400 points.
More importantly, as others have pointed out, the scores are not uniformly distributed, they are closer to a normal distribution (colloquially, a bell curve).