the Berasit Hebrew Dictionary

אלפ

alep is typically translated as “thousand”, but other values are possible, including “100”, “144” or even “360”

In Joshua 7:3 two forms of the word are used; 'alep' and 'alepim'.

The verse is traditionally translated as:

“do not send all the people but about two thousand men or three thousand men to the battle”

The relevant phrase is transliterated: alep ais ao seles alepim ais.

Most of the words are easily translated:

(something) men or three (something) men.

Here's where we run into a problem. According to the standard numerical patterns examined here the appellation of the 'im' suffix acts as a ten times multiplier.