2,300,000

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Number

$2 \, 300 \, 000$ (two million, three hundred thousand) is:

$2^5 \times 5^5 \times 23$


Historical Note

According to 1997: David Wells: Curious and Interesting Numbers (2nd ed.), this number appears on the Columna Rostrata of Gaius Duilius, in the form of the symbol for $100 \, 000$ repeated $23$ times.

However, the inscription is worn due to age, and the precise details of what is exactly written there are disputed.