What is the factorial of 428? (428!) 428 Factorial

What is the factorial of 428?

Here we will show you how to calculate the factorial of 428 (aka 428 factorial) and give you the approximate scientific notation answer and the exact answer.

Before we begin, note that the factorial of 428 can be written as 428 followed by an exclamation mark like this: 428!

Factorial of 428 means that you multiply 428 by every number below it. Therefore, you calculate the factorial of 428 by multiplying 428 by 427, then by 426, and so on all the way down to 1. In other words, we calculate 428 × 427 × 426 × ... × 1 to get 428 factorial.

The answer to 428 factorial (428!) contains 943 digits and we have listed the exact entire answer at the bottom of this page. However, below is the approximate scientific notation answer to 428 factorial:

1.2439165917 × 10⁹⁴²

The answer above is also sometimes written as 1.2439165917e+942. Regardless, it means that the approximate answer to 428! is 12439165917 followed by 932 more digits.

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Like we promised, below is the exact answer to 428 factorial (428!) with all 943 digits:

1243916591739194511992047791506418761041644029600711953661890946327314156868972601120439466277229221394151471467992398511967930173373354414964343207503871741489402995790250341312093159277655413877293266121091744763925663201075823817160051470672962449259513728942072299215246321514684073197498110579701111369177345785812611118569512076758607801218500446388962292608709241431882715428103727357181275670274842901450891942283618051432023861607483463534604486687424622399150836354333180285897695738362243701757819939928761323257142150816118884070010046060980844344620435246136930530820009346903821250697568267066215421973950616948363909474741677542670899152099045625476890172103258487550513995134806868947796903449940669405471188414763781001031967720166535314123733769716197294687905582508858383094857060644190311138200028741652431085338886144000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

What is the factorial of 429?
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