28/27

Interval information

Ratio	28/27
Factorization	22 × 3-3 × 7
Monzo	[2 -3 0 1⟩
Size in cents	62.9609¢
Names	septimal chroma, septimal third-tone
Color name	z2, zo 2nd
FJS name	[math]\displaystyle{ \text{m2}^{7} }[/math]
Special properties	superparticular, reduced
Tenney height (log2 nd)	9.56224
Weil height (log2 max(n, d))	9.61471
Wilson height (sopfr(nd))	20
[sound info]
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The superparticular interval 28/27 has the seventh triangular number as a numerator and is the difference between 15/14 and 10/9, 9/8 and 7/6, 9/7 and 4/3, 3/2 and 14/9, 12/7 and 16/9 and 9/5 and 28/25.

http://en.wikipedia.org/wiki/Septimal_third-tone