28788900

Names of 28788900

• Cardinal: 28788900 can be written as Twenty-eight million, seven hundred eighty-eight thousand, nine hundred.

Scientific notation

• Scientific notation: 2.87889 × 10⁷

Factors of 28788900

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 13726

Divisors of 28788900

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 5 6 7 10 12 14 15 20 21 25 28 30 35 42 50 60 70 75 84 100 105 140 150 175 210 300 350 420 525 700 1050 2100 13709 27418 41127 54836 68545 82254 95963 137090 164508 191926 205635 274180 287889 342725 383852 411270 479815 575778 685450 822540 959630 1028175 1151556 1370900 1439445 1919260 2056350 2399075 2878890 4112700 4798150 5757780 7197225 9596300 14394450 28788900
• Sum of all divisors σ(n): 95202240
• Sum of proper divisors (its aliquot sum) s(n): 66413340
• 28788900 is an abundant number, because the sum of its proper divisors (66413340) is greater than itself. Its abundance is 37624440

Bases of 28788900

• Binary: 1101101110100100010100100₂
• Hexadecimal: 0x1B748A4
• Base-36: H51NO

Squares and roots of 28788900

• 28788900 squared (28788900²) is 828800763210000
• 28788900 cubed (28788900³) is 23860262291976369000000
• The square root of 28788900 is 5365.5288648931
• The cube root of 28788900 is 306.4843881069

Scales and comparisons

• 28,788,900 seconds is equal to 47 weeks, 4 days, 4 hours, 55 minutes.
• To count from 1 to 28,788,900 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 28788900 cubic inches would be around 25.5 feet tall.

Recreational maths with 28788900

• 28788900 backwards is 00988782
• 28788900 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 28788900's digits is 42
• More coming soon!