638990000000

Names of 638990000000

• Cardinal: 638990000000 can be written as Six hundred thirty-eight billion, nine hundred ninety million.

Scientific notation

• Scientific notation: 6.3899 × 10¹¹

Factors of 638990000000

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 17
• Sum of prime factors: 212

Divisors of 638990000000

• Number of divisors d(n): 512
• Complete list of divisors:
  1 2 4 5 8 10 11 16 20 22 25 32 37 40 44 50 55 64 74 80 88 100 110 125 128 148 157 160 176 185 200 220 250 275 296 314 320 352 370 400 407 440 500 550 592 625 628 640 704 740 785 800 814 880 925 1000 1100 1184 1250 1256 1375 1408 1480 1570 1600 1628 1727 1760 1850 2000 2035 2200 2368 2500 2512 2750 2960 3125 3140 3200 3256 3454 3520 3700 3925 4000 4070 4400 4625 4736 5000 5024 5500 5809 5920 6250 6280 6512 6875 6908 7040 7400 7850 8000 8140 8635 8800 9250 10000 10048 10175 11000 11618 11840 12500 12560 13024 13750 13816 14800 15625 15700 16000 16280 17270 17600 18500 19625 20000 20096 20350 22000 23125 23236 23680 25000 25120 26048 27500 27632 29045 29600 31250 31400 32560 34375 34540 35200 37000 39250 40000 40700 43175 44000 46250 46472 50000 50240 50875 52096 55000 55264 58090 59200 62500 62800 63899 65120 68750 69080 74000 78125 78500 80000 81400 86350 88000 92500 92944 98125 100000 100480 101750 110000 110528 115625 116180 118400 125000 125600 127798 130240 137500 138160 145225 148000 156250 157000 162800 171875 172700 176000 185000 185888 196250 200000 203500 215875 220000 221056 231250 232360 250000 251200 254375 255596 260480 275000 276320 290450 296000 312500 314000 319495 325600 343750 345400 370000 371776 392500 400000 407000 431750 440000 462500 464720 490625 500000 502400 508750 511192 550000 552640 578125 580900 592000 625000 628000 638990 651200 687500 690800 726125 740000 743552 785000 814000 859375 863500 880000 925000 929440 981250 1000000 1017500 1022384 1079375 1100000 1105280 1156250 1161800 1250000 1256000 1271875 1277980 1302400 1375000 1381600 1452250 1480000 1570000 1597475 1628000 1718750 1727000 1850000 1858880 1962500 2000000 2035000 2044768 2158750 2200000 2312500 2323600 2453125 2500000 2512000 2543750 2555960 2750000 2763200 2890625 2904500 2960000 3140000 3194950 3256000 3437500 3454000 3630625 3700000 3717760 3925000 4070000 4089536 4317500 4400000 4625000 4647200 4906250 5000000 5087500 5111920 5396875 5500000 5526400 5781250 5809000 6280000 6359375 6389900 6512000 6875000 6908000 7261250 7400000 7850000 7987375 8140000 8179072 8635000 9250000 9294400 9812500 10000000 10175000 10223840 10793750 11000000 11562500 11618000 12265625 12560000 12718750 12779800 13750000 13816000 14522500 14800000 15700000 15974750 16280000 17270000 18153125 18500000 18588800 19625000 20350000 20447680 21587500 22000000 23125000 23236000 24531250 25437500 25559600 26984375 27500000 27632000 29045000 31400000 31796875 31949500 32560000 34540000 36306250 37000000 39250000 39936875 40700000 40895360 43175000 46250000 46472000 49062500 50875000 51119200 53968750 55000000 58090000 62800000 63593750 63899000 69080000 72612500 74000000 78500000 79873750 81400000 86350000 90765625 92500000 92944000 98125000 101750000 102238400 107937500 110000000 116180000 127187500 127798000 134921875 138160000 145225000 157000000 159747500 162800000 172700000 181531250 185000000 196250000 199684375 203500000 204476800 215875000 232360000 254375000 255596000 269843750 290450000 314000000 319495000 345400000 363062500 370000000 392500000 399368750 407000000 431750000 453828125 464720000 508750000 511192000 539687500 580900000 638990000 690800000 726125000 785000000 798737500 814000000 863500000 907656250 998421875 1017500000 1022384000 1079375000 1161800000 1277980000 1452250000 1570000000 1597475000 1727000000 1815312500 1996843750 2035000000 2158750000 2323600000 2555960000 2904500000 3194950000 3454000000 3630625000 3993687500 4070000000 4317500000 4992109375 5111920000 5809000000 6389900000 7261250000 7987375000 8635000000 9984218750 11618000000 12779800000 14522500000 15974750000 17270000000 19968437500 25559600000 29045000000 31949500000 39936875000 58090000000 63899000000 79873750000 127798000000 159747500000 319495000000 638990000000
• Sum of all divisors σ(n): 1794159469440
• Sum of proper divisors (its aliquot sum) s(n): 1155169469440
• 638990000000 is an abundant number, because the sum of its proper divisors (1155169469440) is greater than itself. Its abundance is 516179469440

Bases of 638990000000

• Binary: 1001010011000110110001011001111110000000₂
• Hexadecimal: 0x94C6C59F80
• Base-36: 85JQ5BI8

Squares and roots of 638990000000

• 638990000000 squared (638990000000²) is 408308220100000000000000
• 638990000000 cubed (638990000000³) is 260904869561699000000000000000000000
• The square root of 638990000000 is 799368.5007554401
• The cube root of 638990000000 is 8613.2030836751

Scales and comparisons

• 638,990,000,000 seconds is equal to 20,317 years, 47 weeks, 14 hours, 13 minutes, 20 seconds.
• To count from 1 to 638,990,000,000 would take you about forty thousand, six hundred thirty-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 638990000000 cubic inches would be around 717.8 feet tall.

Recreational maths with 638990000000

• 638990000000 backwards is 000000099836
• The number of decimal digits it has is: 12
• The sum of 638990000000's digits is 35
• More coming soon!