642643020

Names of 642643020

• Cardinal: 642643020 can be written as Six hundred forty-two million, six hundred forty-three thousand and twenty.

Scientific notation

• Scientific notation: 6.4264302 × 10⁸

Factors of 642643020

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 135

Divisors of 642643020

• Number of divisors d(n): 216
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 15 18 20 30 31 36 41 45 53 60 62 82 90 93 106 123 124 155 159 164 180 186 205 212 246 265 279 310 318 369 372 410 465 477 492 530 558 615 620 636 738 795 820 930 954 1060 1116 1230 1271 1395 1476 1590 1643 1845 1860 1908 2173 2385 2460 2542 2790 2809 3180 3286 3690 3813 4346 4770 4929 5084 5580 5618 6355 6519 6572 7380 7626 8215 8427 8692 9540 9858 10865 11236 11439 12710 13038 14045 14787 15252 16430 16854 19065 19557 19716 21730 22878 24645 25281 25420 26076 28090 29574 32595 32860 33708 38130 39114 42135 43460 45756 49290 50562 56180 57195 59148 65190 67363 73935 76260 78228 84270 87079 97785 98580 101124 114390 115169 126405 130380 134726 147870 168540 174158 195570 202089 228780 230338 252810 261237 269452 295740 336815 345507 348316 391140 404178 435395 460676 505620 522474 575845 606267 673630 691014 783711 808356 870790 1010445 1036521 1044948 1151690 1212534 1306185 1347260 1382028 1567422 1727535 1741580 2020890 2073042 2303380 2425068 2612370 3031335 3134844 3455070 3570239 3918555 4041780 4146084 5182605 5224740 6062670 6910140 7140478 7837110 10365210 10710717 12125340 14280956 15674220 17851195 20730420 21421434 32132151 35702390 42842868 53553585 64264302 71404780 107107170 128528604 160660755 214214340 321321510 642643020
• Sum of all divisors σ(n): 2100938112
• Sum of proper divisors (its aliquot sum) s(n): 1458295092
• 642643020 is an abundant number, because the sum of its proper divisors (1458295092) is greater than itself. Its abundance is 815652072

Bases of 642643020

• Binary: 100110010011011111010001001100₂
• Hexadecimal: 0x264DF44C
• Base-36: AMM2J0

Squares and roots of 642643020

• 642643020 squared (642643020²) is 412990051154720400
• 642643020 cubed (642643020³) is 265405173704024005111608000
• The square root of 642643020 is 25350.4047304971
• The cube root of 642643020 is 862.9585413061

Scales and comparisons

• 642,643,020 seconds is equal to 20 years, 22 weeks, 3 days, 23 hours, 57 minutes.
• To count from 1 to 642,643,020 would take you about thirty 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 642643020 cubic inches would be around 71.9 feet tall.

Recreational maths with 642643020

• 642643020 backwards is 020346246
• The number of decimal digits it has is: 9
• The sum of 642643020's digits is 27
• More coming soon!