28289280

Names of 28289280

• Cardinal: 28289280 can be written as Twenty-eight million, two hundred eighty-nine thousand, two hundred eighty.

Scientific notation

• Scientific notation: 2.828928 × 10⁷

Factors of 28289280

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 202

Divisors of 28289280

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 30 32 40 48 53 60 64 80 96 106 120 128 139 159 160 192 212 240 256 265 278 318 320 384 417 424 480 530 556 636 640 695 768 795 834 848 960 1060 1112 1272 1280 1390 1590 1668 1696 1920 2085 2120 2224 2544 2780 3180 3336 3392 3840 4170 4240 4448 5088 5560 6360 6672 6784 7367 8340 8480 8896 10176 11120 12720 13344 13568 14734 16680 16960 17792 20352 22101 22240 25440 26688 29468 33360 33920 35584 36835 40704 44202 44480 50880 53376 58936 66720 67840 73670 88404 88960 101760 106752 110505 117872 133440 147340 176808 177920 203520 221010 235744 266880 294680 353616 442020 471488 533760 589360 707232 884040 942976 1178720 1414464 1768080 1885952 2357440 2828928 3536160 4714880 5657856 7072320 9429760 14144640 28289280
• Sum of all divisors σ(n): 92715840
• Sum of proper divisors (its aliquot sum) s(n): 64426560
• 28289280 is an abundant number, because the sum of its proper divisors (64426560) is greater than itself. Its abundance is 36137280

Bases of 28289280

• Binary: 1101011111010100100000000₂
• Hexadecimal: 0x1AFA900
• Base-36: GUC5C

Squares and roots of 28289280

• 28289280 squared (28289280²) is 800283362918400
• 28289280 cubed (28289280³) is 22639440132940234752000
• The square root of 28289280 is 5318.7667743567
• The cube root of 28289280 is 304.7010597779

Scales and comparisons

• 28,289,280 seconds is equal to 46 weeks, 5 days, 10 hours, 8 minutes.
• To count from 1 to 28,289,280 would take you about eighteen weeks!

  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 28289280 cubic inches would be around 25.4 feet tall.

Recreational maths with 28289280

• 28289280 backwards is 08298282
• The number of decimal digits it has is: 8
• The sum of 28289280's digits is 39
• More coming soon!