- 1728 (number)
**1728**is thenatural number following 1727 and preceding 1729. 1728 is adozen gross, or one**great gross**.**In mathematics**It is the cube of 12, and as such is important in the

duodecimal number system.1728 famously occurs in the algebraic formula for thej-invariant of anelliptic curve . As a consequence, it is sometimes called a Zagier as a pun on theGross-Zagier theorem .For the year AD 1728, see

1728 .

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