According to the Yalkut Me'am Loez, this conversation took place in year 3404.
In the Jewish Calendar, one normally counts without the "thousands" (Tof Shin Ayin instead of Heih Tof Shin Ayin).
Therefore, in addition to Mordechai telling Queen Esther "Listen, you got in so we don't go 404 (look at that picture)", 404 is also the Gematria of
- אחד לא שווה לאחד - you got in and "one isn't equal to another" - therefore, only you can go in.
- נקבים נקבים - you got into power so we shouldn't get stabbed with many holes.
- עבודה חדשה - You got into power to practice Shtadlanus - a "new service" which was never practiced before.
- קיבוץ עלומים - You got into power to do "Kibutz Olamim" - to gather all the Jew into praying for you.
- טשולנט - You must introduce Achashveirosh to Cholent (She being Sefardi, it must have been spicy and resulted in Achashveiroshe's wrath).
- לא עלינו ולא עליכם - If you don't go, I don't envy you or us.