42840

Names of 42840

• Cardinal: 42840 can be written as Forty-two thousand, eight hundred forty.

Scientific notation

• Scientific notation: 4.284 × 10⁴

Factors of 42840

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 34

Divisors of 42840

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 17 18 20 21 24 28 30 34 35 36 40 42 45 51 56 60 63 68 70 72 84 85 90 102 105 119 120 126 136 140 153 168 170 180 204 210 238 252 255 280 306 315 340 357 360 408 420 476 504 510 595 612 630 680 714 765 840 952 1020 1071 1190 1224 1260 1428 1530 1785 2040 2142 2380 2520 2856 3060 3570 4284 4760 5355 6120 7140 8568 10710 14280 21420 42840
• Sum of all divisors σ(n): 168480
• Sum of proper divisors (its aliquot sum) s(n): 125640
• 42840 is an abundant number, because the sum of its proper divisors (125640) is greater than itself. Its abundance is 82800

Bases of 42840

• Binary: 1010011101011000₂
• Hexadecimal: 0xA758
• Base-36: X20

Squares and roots of 42840

• 42840 squared (42840²) is 1835265600
• 42840 cubed (42840³) is 78622778304000
• The square root of 42840 is 206.9782597279
• The cube root of 42840 is 34.9904735975

Scales and comparisons

• 42,840 seconds is equal to 11 hours, 54 minutes.
• To count from 1 to 42,840 would take you about eleven hours.

  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 42840 cubic inches would be around 2.9 feet tall.

Recreational maths with 42840

• 42840 backwards is 04824
• 42840 is a Harshad number.
• The number of decimal digits it has is: 5
• The sum of 42840's digits is 18
• More coming soon!