18240

Names of 18240

• Cardinal: 18240 can be written as Eighteen thousand, two hundred forty.

Scientific notation

• Scientific notation: 1.824 × 10⁴

Factors of 18240

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 29

Divisors of 18240

• Number of divisors d(n): 56
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 19 20 24 30 32 38 40 48 57 60 64 76 80 95 96 114 120 152 160 190 192 228 240 285 304 320 380 456 480 570 608 760 912 960 1140 1216 1520 1824 2280 3040 3648 4560 6080 9120 18240
• Sum of all divisors σ(n): 60960
• Sum of proper divisors (its aliquot sum) s(n): 42720
• 18240 is an abundant number, because the sum of its proper divisors (42720) is greater than itself. Its abundance is 24480

Bases of 18240

• Binary: 100011101000000₂
• Hexadecimal: 0x4740
• Base-36: E2O

Squares and roots of 18240

• 18240 squared (18240²) is 332697600
• 18240 cubed (18240³) is 6068404224000
• The square root of 18240 is 135.0555441291
• The cube root of 18240 is 26.3233774609

Scales and comparisons

• 18,240 seconds is equal to 5 hours, 4 minutes.
• To count from 1 to 18,240 would take you about five 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 18240 cubic inches would be around 2.2 feet tall.

Recreational maths with 18240

• 18240 backwards is 04281
• 18240 is a Harshad number.
• The number of decimal digits it has is: 5
• The sum of 18240's digits is 15
• More coming soon!