18005389440

Names of 18005389440

• Cardinal: 18005389440 can be written as Eighteen billion, five million, three hundred eighty-nine thousand, four hundred forty.

Scientific notation

• Scientific notation: 1.800538944 × 10¹⁰

Factors of 18005389440

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 1979

Divisors of 18005389440

• Number of divisors d(n): 256
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 30 32 40 41 48 60 64 80 82 96 120 123 127 128 160 164 192 205 240 246 254 320 328 381 384 410 480 492 508 615 635 640 656 762 820 960 984 1016 1230 1270 1312 1524 1640 1801 1905 1920 1968 2032 2460 2540 2624 3048 3280 3602 3810 3936 4064 4920 5080 5207 5248 5403 6096 6560 7204 7620 7872 8128 9005 9840 10160 10414 10806 12192 13120 14408 15240 15621 15744 16256 18010 19680 20320 20828 21612 24384 26035 26240 27015 28816 30480 31242 36020 39360 40640 41656 43224 48768 52070 54030 57632 60960 62484 72040 73841 78105 78720 81280 83312 86448 104140 108060 115264 121920 124968 144080 147682 156210 166624 172896 208280 216120 221523 228727 230528 243840 249936 288160 295364 312420 333248 345792 369205 416560 432240 443046 457454 499872 576320 590728 624840 666496 686181 691584 738410 833120 864480 886092 914908 999744 1107615 1143635 1152640 1181456 1249680 1372362 1476820 1666240 1728960 1772184 1829816 1999488 2215230 2287270 2362912 2499360 2744724 2953640 3332480 3430905 3457920 3544368 3659632 4430460 4574540 4725824 4998720 5489448 5907280 6861810 7088736 7319264 8860920 9149080 9377807 9451648 9997440 10978896 11814560 13723620 14177472 14638528 17721840 18298160 18755614 21957792 23629120 27447240 28133421 28354944 29277056 35443680 36596320 37511228 43915584 46889035 47258240 54894480 56266842 70887360 73192640 75022456 87831168 93778070 109788960 112533684 140667105 141774720 146385280 150044912 187556140 219577920 225067368 281334210 300089824 375112280 439155840 450134736 562668420 600179648 750224560 900269472 1125336840 1200359296 1500449120 1800538944 2250673680 3000898240 3601077888 4501347360 6001796480 9002694720 18005389440
• Sum of all divisors σ(n): 59287818240
• Sum of proper divisors (its aliquot sum) s(n): 41282428800
• 18005389440 is an abundant number, because the sum of its proper divisors (41282428800) is greater than itself. Its abundance is 23277039360

Bases of 18005389440

• Binary: 10000110001001101000111000010000000₂
• Hexadecimal: 0x431347080
• Base-36: 89RXZEO

Squares and roots of 18005389440

• 18005389440 squared (18005389440²) is 324194048886063513600
• 18005389440 cubed (18005389440³) is 5837240104323971750942736384000
• The square root of 18005389440 is 134184.1624037651
• The cube root of 18005389440 is 2621.0029297471

Scales and comparisons

• 18,005,389,440 seconds is equal to 572 years, 26 weeks, 5 days, 17 hours, 4 minutes.
• To count from 1 to 18,005,389,440 would take you about one thousand, one hundred forty-five 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 18005389440 cubic inches would be around 218.4 feet tall.

Recreational maths with 18005389440

• 18005389440 backwards is 04498350081
• The number of decimal digits it has is: 11
• The sum of 18005389440's digits is 42
• More coming soon!