28129800

Names of 28129800

• Cardinal: 28129800 can be written as Twenty-eight million, one hundred twenty-nine thousand, eight hundred.

Scientific notation

• Scientific notation: 2.81298 × 10⁷

Factors of 28129800

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 454

Divisors of 28129800

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 20 24 25 30 40 50 60 75 100 120 150 173 200 271 300 346 519 542 600 692 813 865 1038 1084 1355 1384 1626 1730 2076 2168 2595 2710 3252 3460 4065 4152 4325 5190 5420 6504 6775 6920 8130 8650 10380 10840 12975 13550 16260 17300 20325 20760 25950 27100 32520 34600 40650 46883 51900 54200 81300 93766 103800 140649 162600 187532 234415 281298 375064 468830 562596 703245 937660 1125192 1172075 1406490 1875320 2344150 2812980 3516225 4688300 5625960 7032450 9376600 14064900 28129800
• Sum of all divisors σ(n): 88030080
• Sum of proper divisors (its aliquot sum) s(n): 59900280
• 28129800 is an abundant number, because the sum of its proper divisors (59900280) is greater than itself. Its abundance is 31770480

Bases of 28129800

• Binary: 1101011010011101000001000₂
• Hexadecimal: 0x1AD3A08
• Base-36: GQX3C

Squares and roots of 28129800

• 28129800 squared (28129800²) is 791285648040000
• 28129800 cubed (28129800³) is 22258707022235592000000
• The square root of 28129800 is 5303.7533879321
• The cube root of 28129800 is 304.1273992803

Scales and comparisons

• 28,129,800 seconds is equal to 46 weeks, 3 days, 13 hours, 50 minutes.
• To count from 1 to 28,129,800 would take you about seventeen 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 28129800 cubic inches would be around 25.3 feet tall.

Recreational maths with 28129800

• 28129800 backwards is 00892182
• 28129800 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 28129800's digits is 30
• More coming soon!