28688640

Names of 28688640

• Cardinal: 28688640 can be written as Twenty-eight million, six hundred eighty-eight thousand, six hundred forty.

Scientific notation

• Scientific notation: 2.868864 × 10⁷

Factors of 28688640

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 282

Divisors of 28688640

• Number of divisors d(n): 144
• 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 80 93 96 120 124 128 155 160 186 192 240 241 248 256 310 320 372 384 465 480 482 496 620 640 723 744 768 930 960 964 992 1205 1240 1280 1446 1488 1860 1920 1928 1984 2410 2480 2892 2976 3615 3720 3840 3856 3968 4820 4960 5784 5952 7230 7440 7471 7712 7936 9640 9920 11568 11904 14460 14880 14942 15424 19280 19840 22413 23136 23808 28920 29760 29884 30848 37355 38560 39680 44826 46272 57840 59520 59768 61696 74710 77120 89652 92544 112065 115680 119040 119536 149420 154240 179304 185088 224130 231360 239072 298840 308480 358608 448260 462720 478144 597680 717216 896520 925440 956288 1195360 1434432 1793040 1912576 2390720 2868864 3586080 4781440 5737728 7172160 9562880 14344320 28688640
• Sum of all divisors σ(n): 94972416
• Sum of proper divisors (its aliquot sum) s(n): 66283776
• 28688640 is an abundant number, because the sum of its proper divisors (66283776) is greater than itself. Its abundance is 37595136

Bases of 28688640

• Binary: 1101101011100000100000000₂
• Hexadecimal: 0x1B5C100
• Base-36: H2WAO

Squares and roots of 28688640

• 28688640 squared (28688640²) is 823038065049600
• 28688640 cubed (28688640³) is 23611842754504556544000
• The square root of 28688640 is 5356.1777416363
• The cube root of 28688640 is 306.1281875677

Scales and comparisons

• 28,688,640 seconds is equal to 47 weeks, 3 days, 1 hour, 4 minutes.
• To count from 1 to 28,688,640 would take you about nineteen 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 28688640 cubic inches would be around 25.5 feet tall.

Recreational maths with 28688640

• 28688640 backwards is 04688682
• The number of decimal digits it has is: 8
• The sum of 28688640's digits is 42
• More coming soon!