Use of Sprintf increases code size!!

Hi,
When i use the following code, the code size is as below:
unsigned char Buf[3];
unsigned long oncount = 0;

sprintf (Buf,"%d",(int)(oncount/360000));
Program Size: data=45.1 xdata=1 code=1847

And when i dont use the Sprintf my code size gets reduced as below:
Program Size: data=24.0 xdata=1 code=558

Is there any alternate for Sprintf ??

Aniket