Find the largest number, a single string of only digits - without radix or exponent, that can be equated to a mathematical expression that uses no variables and where each and every digit, 0 to 9, is used but once in the equation. Provide the equation.

Mathematical symbols and functions are permitted, yet limit each to less than the arbitrary number of ten.

If limited to digits 0 to 5, a possible answer, for example, could be:

**5!/(4 - 3) = 120**.

(In reply to

6 digits (3 x10^6) by Leming)

why (3 x10^6) ???????

3000000 is seven digits

and my 6digits string is higher!

Lets try to improve