3600
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26,880 seconds.
One hour equals 3600 seconds and 1 minute equals 60 seconds, so 4 hours + 28 minutes = 14400 seconds + 1680 seconds = 16080 seconds
There are 60 minutes x 60 seconds for 24 hours, multiplied by 28 60*60*24*28=2,419,200 seconds 60*24*28=40,320 minutes 24*28=672 hours those are the time measurements for a regular month of February
28 seconds is 7/15 minutes or 0.466667 minutes. 28 hours is 1680 minutes.
3 hours 47 minutes, 28 seconds.