28978710720

Names of 28978710720

• Cardinal: 28978710720 can be written as Twenty-eight billion, nine hundred seventy-eight million, seven hundred ten thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.897871072 × 10¹⁰

Factors of 28978710720

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 13453

Divisors of 28978710720

• Number of divisors d(n): 224
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 30 31 32 40 48 60 62 64 73 80 93 96 120 124 146 155 160 186 192 219 240 248 292 310 320 365 372 438 465 480 496 584 620 730 744 876 930 960 992 1095 1168 1240 1460 1488 1752 1860 1984 2190 2263 2336 2480 2920 2976 3504 3720 4380 4526 4672 4960 5840 5952 6789 7008 7440 8760 9052 9920 11315 11680 13339 13578 14016 14880 17520 18104 22630 23360 26678 27156 29760 33945 35040 36208 40017 45260 53356 54312 66695 67890 70080 72416 80034 90520 106712 108624 133390 135780 144832 160068 181040 200085 213424 217248 266780 271560 320136 362080 400170 413509 426848 434496 533560 543120 640272 724160 800340 827018 853696 973747 1067120 1086240 1240527 1280544 1600680 1654036 1947494 2067545 2134240 2172480 2481054 2561088 2921241 3201360 3308072 3894988 4135090 4268480 4868735 4962108 5842482 6202635 6402720 6616144 7789976 8270180 9737470 9924216 11684964 12405270 12805440 13232288 14606205 15579952 16540360 19474940 19848432 23369928 24810540 26464576 29212410 30186157 31159904 33080720 38949880 39696864 46739856 49621080 58424820 60372314 62319808 66161440 77899760 79393728 90558471 93479712 99242160 116849640 120744628 132322880 150930785 155799520 181116942 186959424 198484320 233699280 241489256 301861570 311599040 362233884 396968640 452792355 467398560 482978512 603723140 724467768 905584710 934797120 965957024 1207446280 1448935536 1811169420 1931914048 2414892560 2897871072 3622338840 4829785120 5795742144 7244677680 9659570240 14489355360 28978710720
• Sum of all divisors σ(n): 96283637760
• Sum of proper divisors (its aliquot sum) s(n): 67304927040
• 28978710720 is an abundant number, because the sum of its proper divisors (67304927040) is greater than itself. Its abundance is 38326216320

Bases of 28978710720

• Binary: 11010111111010001000000100011000000₂
• Hexadecimal: 0x6BF4408C0
• Base-36: DB96CAO

Squares and roots of 28978710720

• 28978710720 squared (28978710720²) is 839765674993442918400
• 28978710720 cubed (28978710720³) is 24335326568220520229146165248000
• The square root of 28978710720 is 170231.3447047869
• The cube root of 28978710720 is 3071.5648322931

Scales and comparisons

• 28,978,710,720 seconds is equal to 921 years, 22 weeks, 3 days, 17 hours, 52 minutes.
• To count from 1 to 28,978,710,720 would take you about one thousand, eight hundred forty-two 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 28978710720 cubic inches would be around 256 feet tall.

Recreational maths with 28978710720

• 28978710720 backwards is 02701787982
• The number of decimal digits it has is: 11
• The sum of 28978710720's digits is 51
• More coming soon!