78142140

Names of 78142140

• Cardinal: 78142140 can be written as Seventy-eight million, one hundred forty-two thousand, one hundred forty.

Scientific notation

• Scientific notation: 7.814214 × 10⁷

Factors of 78142140

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 8254

Divisors of 78142140

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 15 18 20 30 36 45 53 60 90 106 159 180 212 265 318 477 530 636 795 954 1060 1590 1908 2385 3180 4770 8191 9540 16382 24573 32764 40955 49146 73719 81910 98292 122865 147438 163820 245730 294876 368595 434123 491460 737190 868246 1302369 1474380 1736492 2170615 2604738 3907107 4341230 5209476 6511845 7814214 8682460 13023690 15628428 19535535 26047380 39071070 78142140
• Sum of all divisors σ(n): 241532928
• Sum of proper divisors (its aliquot sum) s(n): 163390788
• 78142140 is an abundant number, because the sum of its proper divisors (163390788) is greater than itself. Its abundance is 85248648

Bases of 78142140

• Binary: 100101010000101101010111100₂
• Hexadecimal: 0x4A85ABC
• Base-36: 1AIUV0

Squares and roots of 78142140

• 78142140 squared (78142140²) is 6106194043779600
• 78142140 cubed (78142140³) is 477151069836191632344000
• The square root of 78142140 is 8839.8042964763
• The cube root of 78142140 is 427.5252473033

Scales and comparisons

• 78,142,140 seconds is equal to 2 years, 25 weeks, 1 day, 10 hours, 9 minutes.
• To count from 1 to 78,142,140 would take you about three years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 78142140 cubic inches would be around 35.6 feet tall.

Recreational maths with 78142140

• 78142140 backwards is 04124187
• The number of decimal digits it has is: 8
• The sum of 78142140's digits is 27
• More coming soon!