How to convert total number of minute into hour format?

Recently I faced a problem to convert total number of minutes into hour format. So I come through the below solution and just wanna to share with all.

-- SELECT dbo.fnGetHour(120)

CREATE FUNCTION [dbo].[fnGetHour](@minute BIGINT)

RETURNS NVARCHAR(10)

AS

BEGIN

       DECLARE @Num2 INT = 60

       DECLARE @hour nvarchar(10)

       SELECT @hour =

              CASE WHEN LEN(CONVERT(VARCHAR, @minute / @Num2)) = 1 THEN '0' + CONVERT(VARCHAR, @minute / @Num2) + ':' +

                     CASE WHEN LEN(CONVERT(VARCHAR, @minute % @Num2)) = 1 THEN '0' + CONVERT(VARCHAR, @minute % @Num2)

                           ELSE CONVERT(VARCHAR, @minute % @Num2)

                     END

              ELSE CONVERT(VARCHAR, @minute / @Num2) + ':' +

                     CASE WHEN LEN(CONVERT(VARCHAR, @minute % @Num2)) = 1 THEN '0'+CONVERT(VARCHAR, @minute % @Num2)

                           ELSE CONVERT(VARCHAR, @minute % @Num2)

                     END

              END

       RETURN @hour

END