18128025

Names of 18128025

• Cardinal: 18128025 can be written as Eighteen million, one hundred twenty-eight thousand and twenty-five.

Scientific notation

• Scientific notation: 1.8128025 × 10⁷

Factors of 18128025

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 175

Divisors of 18128025

• Number of divisors d(n): 72
• Complete list of divisors:
  1 3 5 9 15 23 25 31 45 69 75 93 113 115 155 207 225 279 339 345 465 565 575 713 775 1017 1035 1395 1695 1725 2139 2325 2599 2825 3503 3565 5085 5175 6417 6975 7797 8475 10509 10695 12995 17515 17825 23391 25425 31527 32085 38985 52545 53475 64975 80569 87575 116955 157635 160425 194925 241707 262725 402845 584775 725121 788175 1208535 2014225 3625605 6042675 18128025
• Sum of all divisors σ(n): 35283456
• Sum of proper divisors (its aliquot sum) s(n): 17155431
• 18128025 is a deficient number, because the sum of its proper divisors (17155431) is less than itself. Its deficiency is 972594

Bases of 18128025

• Binary: 1000101001001110010011001₂
• Hexadecimal: 0x1149C99
• Base-36: ASJO9

Squares and roots of 18128025

• 18128025 squared (18128025²) is 328625290400625
• 18128025 cubed (18128025³) is 5957327480014790015625
• The square root of 18128025 is 4257.7018448923
• The cube root of 18128025 is 262.6940062399

Scales and comparisons

• 18,128,025 seconds is equal to 29 weeks, 6 days, 19 hours, 33 minutes, 45 seconds.
• To count from 1 to 18,128,025 would take you about forty-four 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 18128025 cubic inches would be around 21.9 feet tall.

Recreational maths with 18128025

• 18128025 backwards is 52082181
• The number of decimal digits it has is: 8
• The sum of 18128025's digits is 27
• More coming soon!