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The Number 406

406 is a Triangular Number.

406 is a 21-gonal Number.

406 is a 69-gonal Number.

406 is a Centered Nonagonal Number.

406 is a Centered 27-gonal Number.

According to Jainism the total number of Soul classes=406

406 is a poem by John Boyle O'Reilly. The number had a mystical significance to him.

406 is the area code for Montana.

The Year 406 AD

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