Transform values of hash functions like MD5 into numbers
The output 735b90b4568125ed6c3f678819b6e058 is just a hexadecimal representation of a 128-bit (in binary) number, which corresponds directly to an integer between $0$ and $2^{128}-1$.  Therefore, you can think of MD5 as returning a numeric value.  You should be able to make the conversion from hexadecimal  string to integer trivially using any programming language (if not, Stack Overflow is the place to go to).