400 ‖ number four hundred

integer, natural,
positive, counting number, even

composite

400 ― 321^st composite number,
divisible by 1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200 & 400
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square

20²

0. bin code

   001101000011000000110000

1. url code

   %34%30%30

2. html codes

   • 400
   • 400

3. css codes

   • \0034\0030\0030
   • \34\30\30

4. js codes

   • \u0034\u0030\u0030
   • \u{34}\u{30}\u{30}
   • \x34\x30\x30

relates

• n.30
• n.34
• n.48
• n.52