381840

Names of 381840

• Cardinal: 381840 can be written as Three hundred eighty-one thousand, eight hundred forty.

Scientific notation

• Scientific notation: 3.8184 × 10⁵

Factors of 381840

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 90

Divisors of 381840

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 30 37 40 43 48 60 74 80 86 111 120 129 148 172 185 215 222 240 258 296 344 370 430 444 516 555 592 645 688 740 860 888 1032 1110 1290 1480 1591 1720 1776 2064 2220 2580 2960 3182 3440 4440 4773 5160 6364 7955 8880 9546 10320 12728 15910 19092 23865 25456 31820 38184 47730 63640 76368 95460 127280 190920 381840
• Sum of all divisors σ(n): 1243968
• Sum of proper divisors (its aliquot sum) s(n): 862128
• 381840 is an abundant number, because the sum of its proper divisors (862128) is greater than itself. Its abundance is 480288

Bases of 381840

• Binary: 1011101001110010000₂
• Hexadecimal: 0x5D390
• Base-36: 86MO

Squares and roots of 381840

• 381840 squared (381840²) is 145801785600
• 381840 cubed (381840³) is 55672953813504000
• The square root of 381840 is 617.9320350977
• The cube root of 381840 is 72.5482833347

Scales and comparisons

• 381,840 seconds is equal to 4 days, 10 hours, 4 minutes.
• To count from 1 to 381,840 would take you about four days.

  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 381840 cubic inches would be around 6 feet tall.

Recreational maths with 381840

• 381840 backwards is 048183
• 381840 is a Harshad number.
• The number of decimal digits it has is: 6
• The sum of 381840's digits is 24
• More coming soon!