Number 78

A page of the Numeropedia - the Special Encyclopedia of Numbers

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[Chemistry]  The atomic number of Platinum (Pt).

[Math.]  A triangular number (sum of all integers from 1 to 12):

78 = 1+2+3+4+5+6+7+8+9+10+11+12.

[Math.]  782 = 6084  = (–006+084)2

783 = 474552  = (–474+552)3

784 = 37,015,056  = (037–015+056)4

786 = 225,199,600,704  (–225+199–600+704)6

787 = 17,565,568,854,912  (017–565+568–854+912)7

788 = 1,370,114,370,683,136 = (–001+370–114+370–683+136)8

7810 = 8,335,775,831,236,199,424 = (008–335+775–831+236–199+424)10

7811 = 650,190,514,836,423,555,072 = (650–190+514–836+423–555+072)11

7812 = 50,714,860,157,241,037,295,616 = (–050+714–860+157–241+037–295+616)12

7813 = 3,955,759,092,264,800,909,058,048 =

= (003–955+759–092+264–800+909–058+048)13.

Also:

785 = 2,887,174,368 and –002+887–174+368 = 1079, where –001+079 = 78.

789  = 106,868,920,913,284,608 and –106+868–920+913–284+608 = 1079.

7814 = 308,549,209,196,654,470,906,527,744

and 308–549+209–196+654–470+906–527+744 = 1079.

[Math.]  A sequence of palindromic numbers: 77, 77×78 = 6,006 and 77×78×79 = 474,474.

[Math.]  Rule of 78 (sum of the digits of 12 months of a year) is a formula to determine on interest for installment loans. The lender earns 12/78th of total interest in the first month, 11/78th in the 2nd month and so on…

[Science]

 American system British system Number ***** tredecillion 1078 tredecillion septillion 1042 septillion quadrillion 1024 quadrillion ***** 1015