I rounded it, while having a variable

[elry]

public class fall : MonoBehaviour
{
    float time;
    
    // Update is called once per frame
    void Update()
    {
        time = Mathf.Round(Time.time);
        Debug.Log("You are playing since " + time +" seconds.");
    }
}

[jbwb]

Another way to achieve a more readable number is to use formatted strings:

Debug.Log($"Time: {Time.time:0.0}s");

Helpful links:
String Interpolation
String.Format

[Rostami]

… or cast it to int :

Debug.Log(“seconds gone :” + (int)Time.time);