How many non-decalogue commandments from the Old Testament are still morally binding for Christians?

Many denominations believe that Christians should obey the [ten commandments](https://en.wikipedia.org/wiki/Ten_Commandments) (also known as the decalogue), which can be found in Exodus 20:1-17. However, there are [613 commandments](https://en.wikipedia.org/wiki/613_commandments) in the Old Testament, not just 10. Moreover, Jesus himself claimed in Matthew 22:36-40 that the two greatest commandments **are not** part of the decalogue. In other words, Jesus endorsed the observance of two non-decalogue commandments. This makes me wonder: how many of the 603 non-decalogue commandments are still morally binding for Christians today? I know that the two greatest commandments definitely are, but are there others?