218138440

Names of 218138440

• Cardinal: 218138440 can be written as Two hundred eighteen million, one hundred thirty-eight thousand, four hundred forty.

Scientific notation

• Scientific notation: 2.1813844 × 10⁸

Factors of 218138440

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 104

Divisors of 218138440

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 4 5 8 10 13 20 23 26 40 46 52 61 65 92 104 115 122 130 169 184 230 244 260 299 305 338 460 488 520 529 598 610 676 793 845 920 1058 1196 1220 1352 1403 1495 1586 1690 2116 2392 2440 2645 2806 2990 3172 3380 3887 3965 4232 5290 5612 5980 6344 6760 6877 7015 7774 7930 10309 10580 11224 11960 13754 14030 15548 15860 18239 19435 20618 21160 27508 28060 31096 31720 32269 34385 36478 38870 41236 51545 55016 56120 64538 68770 72956 77740 82472 89401 91195 103090 129076 137540 145912 155480 161345 178802 182390 206180 237107 258152 275080 322690 357604 364780 412360 419497 447005 474214 645380 715208 729560 838994 894010 948428 1185535 1290760 1677988 1788020 1896856 2097485 2371070 3355976 3576040 4194970 4742140 5453461 8389940 9484280 10906922 16779880 21813844 27267305 43627688 54534610 109069220 218138440
• Sum of all divisors σ(n): 564690420
• Sum of proper divisors (its aliquot sum) s(n): 346551980
• 218138440 is an abundant number, because the sum of its proper divisors (346551980) is greater than itself. Its abundance is 128413540

Bases of 218138440

• Binary: 1101000000001000011101001000₂
• Hexadecimal: 0xD008748
• Base-36: 3LVGP4

Squares and roots of 218138440

• 218138440 squared (218138440²) is 47584379005633600
• 218138440 cubed (218138440³) is 10379982204657664715584000
• The square root of 218138440 is 14769.5104861335
• The cube root of 218138440 is 601.9735384961

Scales and comparisons

• 218,138,440 seconds is equal to 6 years, 48 weeks, 4 days, 18 hours, 40 seconds.
• To count from 1 to 218,138,440 would take you about ten 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 218138440 cubic inches would be around 50.2 feet tall.

Recreational maths with 218138440

• 218138440 backwards is 044831812
• The number of decimal digits it has is: 9
• The sum of 218138440's digits is 31
• More coming soon!