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4,000,000 (four million) is the number of dominoes set up for Friday, November 15, 2002 in Leeuwarden, which has therefore been named Expressions for Millions.

It is also the first prize (El Gordo) in the Spanish Christmas Lottery in euros.

It was also the prize for correctly answering the first seven questions in the Italian game show Chi vuol essere miliardario? in Italian lire.

This number is equal to 2,0002.

In the Hawaiian language, 4,000,000 is sometimes called "nalowale".[1]

## In other notations

Notation Approximation
Scientific notation $$4 \times 10^6$$ (exact)
Arrow notation $$2,000↑2$$ (exact)
BEAF $$\{2000,2\}$$ (exact)
Chained arrow notation $$2,000→2$$ (exact)
Hyperfactorial array notation $$10!$$
Fast-growing hierarchy $$f_2(18)$$
Hardy hierarchy $$H_{\omega 8}(15,625)$$ (exact)
Slow-growing hierarchy $$g_{\omega^2}(2,000)$$ (exact)