# 208 (number)

Short description: Natural number
 ← 207 208 209 →
Cardinaltwo hundred eight
Ordinal208th
(two hundred eighth)
Factorization24 × 13
Greek numeralΣΗ´
Roman numeralCCVIII
Binary110100002
Ternary212013
Quaternary31004
Quinary13135
Senary5446
Octal3208
Duodecimal15412
VigesimalA820
Base 365S36

208 (two hundred [and] eight) is the natural number following 207 and preceding 209.

208 is a practical number,[1] a tetranacci number,[2][3] a rhombic matchstick number,[4] a happy number, and a member of Aronson's sequence.[5] There are exactly 208 five-bead necklaces drawn from a set of beads with four colors,[6] and 208 generalized weak orders on three labeled points.[7][8]

## References

1. Sloane, N. J. A., ed. "Sequence A005153 (Practical numbers)". OEIS Foundation.
2. Sloane, N. J. A., ed. "Sequence A000078 (Tetranacci numbers)". OEIS Foundation.
3. Waddill, Marcellus E. (1992), "The Tetranacci sequence and generalizations", The Fibonacci Quarterly 30 (1): 9–20 .
4. Sloane, N. J. A., ed. "Sequence A045944 (Rhombic matchstick numbers)". OEIS Foundation.
5.
6. Sloane, N. J. A., ed. "Sequence A004121 (Generalized weak orders on n points)". OEIS Foundation.
7. Wagner, Carl G. (1982), "Enumeration of generalized weak orders", Archiv der Mathematik 39 (2): 147–152, doi:10.1007/BF01899195 .