Function Seconds to Time

USE [oktell]
GO
/****** Object:  UserDefinedFunction [dbo].[IntToTimeStr]    Script Date: 30.07.2019 14:17:49 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author:      <Author,,Name>
-- Create date: <Create Date, ,>
-- Description: <Description, ,>
-- =============================================
ALTER FUNCTION [dbo].[IntToTimeStr] (@number int) RETURNS nvarchar(50)
AS
BEGIN
    RETURN
    IIF(LEN(CAST(FLOOR(@number / 3600) as nvarchar(10))) = 1, '0' + CAST(FLOOR(@number / 3600) as nvarchar(10)), CAST(FLOOR(@number / 3600) as nvarchar(10)))
        + ':' +
    IIF(LEN(CAST(FLOOR(@number / 60 - FLOOR(@number /3600) * 60) as nvarchar(10))) = 1, '0' + CAST(FLOOR(@number/60 - FLOOR(@number / 3600) * 60) as nvarchar(10)), CAST(FLOOR(@number / 60 - FLOOR(@number / 3600) * 60) as nvarchar(10)))
        + ':' +
    IIF(LEN(CAST(FLOOR(@number - FLOOR(@number / 60) * 60) as nvarchar(10))) = 1, '0' + CAST(FLOOR(@number - FLOOR(@number / 60) * 60) as nvarchar(10)), CAST(FLOOR(@number - FLOOR(@number / 60) * 60) as nvarchar(10)))
END