28909980

Names of 28909980

• Cardinal: 28909980 can be written as Twenty-eight million, nine hundred nine thousand, nine hundred eighty.

Scientific notation

• Scientific notation: 2.890998 × 10⁷

Factors of 28909980

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 209

Divisors of 28909980

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 4 5 6 9 10 11 12 15 18 20 22 27 30 31 33 36 44 45 54 55 60 62 66 90 93 99 108 110 124 132 135 155 157 165 180 186 198 220 270 279 297 310 314 330 341 372 396 465 471 495 540 558 594 620 628 660 682 785 837 930 942 990 1023 1116 1188 1364 1395 1413 1485 1570 1674 1705 1727 1860 1884 1980 2046 2355 2790 2826 2970 3069 3140 3348 3410 3454 4092 4185 4239 4710 4867 5115 5181 5580 5652 5940 6138 6820 6908 7065 8370 8478 8635 9207 9420 9734 10230 10362 12276 14130 14601 15345 15543 16740 16956 17270 18414 19468 20460 20724 21195 24335 25905 28260 29202 30690 31086 34540 36828 42390 43803 46035 46629 48670 51810 53537 58404 61380 62172 73005 77715 84780 87606 92070 93258 97340 103620 107074 131409 146010 155430 160611 175212 184140 186516 214148 219015 233145 262818 267685 292020 310860 321222 438030 466290 481833 525636 535370 642444 657045 803055 876060 932580 963666 1070740 1314090 1445499 1606110 1927332 2409165 2628180 2890998 3212220 4818330 5781996 7227495 9636660 14454990 28909980
• Sum of all divisors σ(n): 101928960
• Sum of proper divisors (its aliquot sum) s(n): 73018980
• 28909980 is an abundant number, because the sum of its proper divisors (73018980) is greater than itself. Its abundance is 44109000

Bases of 28909980

• Binary: 1101110010010000110011100₂
• Hexadecimal: 0x1B9219C
• Base-36: H7N30

Squares and roots of 28909980

• 28909980 squared (28909980²) is 835786943600400
• 28909980 cubed (28909980³) is 24162583823748691992000
• The square root of 28909980 is 5376.8001636661
• The cube root of 28909980 is 306.9134565621

Scales and comparisons

• 28,909,980 seconds is equal to 47 weeks, 5 days, 14 hours, 33 minutes.
• To count from 1 to 28,909,980 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 28909980 cubic inches would be around 25.6 feet tall.

Recreational maths with 28909980

• 28909980 backwards is 08990982
• 28909980 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 28909980's digits is 45
• More coming soon!