A few hundred per month. Let’s do some math. Let’s say you work and earn some form of income for 35 years, or 420 months. If you save 500 every month, you’ll have a grand total of 210.000. That’s 790k off of a million. Even at 1k per month, you’re still less than halfway into being a millionaire.
You need to have a consistent salary of over 2.380/month (28.5k/year) to accrue a total of 1 million during those 35 years. So, supposing you earn 5k a month (60k/year), and can put half of that into savings, yes, you can “become a millionaire” by the time you’re retiring.