1808145990

Names of 1808145990

• Cardinal: 1808145990 can be written as One billion, eight hundred eight million, one hundred forty-five thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 1.80814599 × 10⁹

Factors of 1808145990

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 175

Divisors of 1808145990

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 3 5 6 7 9 10 14 15 18 21 27 30 31 35 42 45 54 62 63 70 81 90 93 105 126 127 135 155 162 186 189 210 217 243 254 270 279 310 315 378 381 405 434 465 486 558 567 630 635 651 729 762 810 837 889 930 945 1085 1134 1143 1215 1270 1302 1395 1458 1674 1701 1778 1890 1905 1953 2170 2187 2286 2430 2511 2667 2790 2835 3255 3402 3429 3645 3810 3906 3937 4185 4374 4445 5022 5103 5334 5670 5715 5859 6510 6561 6858 7290 7533 7874 8001 8370 8505 8890 9765 10206 10287 10935 11430 11718 11811 12555 13122 13335 15066 15309 16002 17010 17145 17577 19530 19685 20574 21870 22599 23622 24003 25110 25515 26670 27559 29295 30618 30861 32805 34290 35154 35433 37665 39370 40005 45198 45927 48006 51030 51435 52731 55118 58590 59055 61722 65610 67797 70866 72009 75330 76545 80010 82677 87885 91854 92583 102870 105462 106299 112995 118110 120015 135594 137795 144018 153090 154305 158193 165354 175770 177165 185166 203391 212598 216027 225990 229635 240030 248031 263655 275590 277749 308610 316386 318897 338985 354330 360045 406782 413385 432054 459270 462915 474579 496062 527310 531495 555498 637794 648081 677970 720090 744093 790965 826770 833247 925830 949158 956691 1016955 1062990 1080135 1240155 1296162 1388745 1423737 1488186 1581930 1594485 1666494 1913382 1944243 2033910 2160270 2232279 2372895 2480310 2777490 2847474 2870073 3188970 3240405 3720465 3888486 4166235 4464558 4745790 4783455 5740146 5832729 6480810 6696837 7118685 7440930 8332470 8610219 9566910 9721215 11161395 11665458 13393674 14237370 14350365 17220438 19442430 20090511 22322790 25830657 28700730 29163645 33484185 40181022 43051095 51661314 58327290 60271533 66968370 86102190 100452555 120543066 129153285 180814599 200905110 258306570 301357665 361629198 602715330 904072995 1808145990
• Sum of all divisors σ(n): 5804457984
• Sum of proper divisors (its aliquot sum) s(n): 3996311994
• 1808145990 is an abundant number, because the sum of its proper divisors (3996311994) is greater than itself. Its abundance is 2188166004

Bases of 1808145990

• Binary: 1101011110001100001111001000110₂
• Hexadecimal: 0x6BC61E46
• Base-36: TWIUDI

Squares and roots of 1808145990

• 1808145990 squared (1808145990²) is 3269391921153080100
• 1808145990 cubed (1808145990³) is 5911537891971337958963799000
• The square root of 1808145990 is 42522.2999142803
• The cube root of 1808145990 is 1218.2726585103

Scales and comparisons

• 1,808,145,990 seconds is equal to 57 years, 25 weeks, 4 days, 14 hours, 46 minutes, 30 seconds.
• To count from 1 to 1,808,145,990 would take you about one hundred fourteen 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 1808145990 cubic inches would be around 101.5 feet tall.

Recreational maths with 1808145990

• 1808145990 backwards is 0995418081
• 1808145990 is a Harshad number.
• The number of decimal digits it has is: 10
• The sum of 1808145990's digits is 45
• More coming soon!