28280000

Names of 28280000

• Cardinal: 28280000 can be written as Twenty-eight million, two hundred eighty thousand.

Scientific notation

• Scientific notation: 2.828 × 10⁷

Factors of 28280000

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 115

Divisors of 28280000

• Number of divisors d(n): 140
• Complete list of divisors:
  1 2 4 5 7 8 10 14 16 20 25 28 32 35 40 50 56 64 70 80 100 101 112 125 140 160 175 200 202 224 250 280 320 350 400 404 448 500 505 560 625 700 707 800 808 875 1000 1010 1120 1250 1400 1414 1600 1616 1750 2000 2020 2240 2500 2525 2800 2828 3232 3500 3535 4000 4040 4375 5000 5050 5600 5656 6464 7000 7070 8000 8080 8750 10000 10100 11200 11312 12625 14000 14140 16160 17500 17675 20000 20200 22624 25250 28000 28280 32320 35000 35350 40000 40400 45248 50500 56000 56560 63125 70000 70700 80800 88375 101000 113120 126250 140000 141400 161600 176750 202000 226240 252500 280000 282800 353500 404000 441875 505000 565600 707000 808000 883750 1010000 1131200 1414000 1767500 2020000 2828000 3535000 4040000 5656000 7070000 14140000 28280000
• Sum of all divisors σ(n): 80936592
• Sum of proper divisors (its aliquot sum) s(n): 52656592
• 28280000 is an abundant number, because the sum of its proper divisors (52656592) is greater than itself. Its abundance is 24376592

Bases of 28280000

• Binary: 1101011111000010011000000₂
• Hexadecimal: 0x1AF84C0
• Base-36: GU4ZK

Squares and roots of 28280000

• 28280000 squared (28280000²) is 799758400000000
• 28280000 cubed (28280000³) is 22617167552000000000000
• The square root of 28280000 is 5317.8943201233
• The cube root of 28280000 is 304.6677381441

Scales and comparisons

• 28,280,000 seconds is equal to 46 weeks, 5 days, 7 hours, 33 minutes, 20 seconds.
• To count from 1 to 28,280,000 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 28280000 cubic inches would be around 25.4 feet tall.

Recreational maths with 28280000

• 28280000 backwards is 00008282
• 28280000 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 28280000's digits is 20
• More coming soon!