How many people survive on $1 dollar a day?

I'm curious to know, could you provide me with an estimate on how many individuals worldwide are living on just $1 a day? This question stems from a genuine concern for global poverty and the financial struggles faced by millions. I understand that this figure is likely to fluctuate due to various economic and social factors, but I'm eager to gain a better understanding of the scale of this issue. Can you shed some light on this matter?