Why is it die Millionensumme?

Millionensumme is a compound noun, and German compounds take the article of their last word: die Summe. So it’s die Millionensumme.

Sense 1
die

Meaning

[1] Sum in millions

[1] Summe in Millionenhöhe

Examples

[1]

[1]

Declension

1 Singular Plural
Nominativ die Millionensumme die Millionensummen
Genitiv der Millionensumme der Millionensummen
Dativ der Millionensumme den Millionensummen
Akkusativ die Millionensumme die Millionensummen

Pronunciation

Dictionary entries include material from Wiktionary. Wiktionary