28723240

Names of 28723240

• Cardinal: 28723240 can be written as Twenty-eight million, seven hundred twenty-three thousand, two hundred forty.

Scientific notation

• Scientific notation: 2.872324 × 10⁷

Factors of 28723240

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 634

Divisors of 28723240

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 5 7 8 10 13 14 20 26 28 35 40 52 56 65 70 91 104 130 140 169 182 260 280 338 364 455 520 607 676 728 845 910 1183 1214 1352 1690 1820 2366 2428 3035 3380 3640 4249 4732 4856 5915 6070 6760 7891 8498 9464 11830 12140 15782 16996 21245 23660 24280 31564 33992 39455 42490 47320 55237 63128 78910 84980 102583 110474 157820 169960 205166 220948 276185 315640 410332 441896 512915 552370 718081 820664 1025830 1104740 1436162 2051660 2209480 2872324 3590405 4103320 5744648 7180810 14361620 28723240
• Sum of all divisors σ(n): 80110080
• Sum of proper divisors (its aliquot sum) s(n): 51386840
• 28723240 is an abundant number, because the sum of its proper divisors (51386840) is greater than itself. Its abundance is 22663600

Bases of 28723240

• Binary: 1101101100100100000101000₂
• Hexadecimal: 0x1B64828
• Base-36: H3MZS

Squares and roots of 28723240

• 28723240 squared (28723240²) is 825024516097600
• 28723240 cubed (28723240³) is 23697377181755228224000
• The square root of 28723240 is 5359.4066835799
• The cube root of 28723240 is 306.2512069923

Scales and comparisons

• 28,723,240 seconds is equal to 47 weeks, 3 days, 10 hours, 40 minutes, 40 seconds.
• To count from 1 to 28,723,240 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 28723240 cubic inches would be around 25.5 feet tall.

Recreational maths with 28723240

• 28723240 backwards is 04232782
• 28723240 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 28723240's digits is 28
• More coming soon!