18389490

Names of 18389490

• Cardinal: 18389490 can be written as Eighteen million, three hundred eighty-nine thousand, four hundred ninety.

Scientific notation

• Scientific notation: 1.838949 × 10⁷

Factors of 18389490

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 1391

Divisors of 18389490

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 5 6 7 10 14 15 21 30 35 42 67 70 105 134 201 210 335 402 469 670 938 1005 1307 1407 2010 2345 2614 2814 3921 4690 6535 7035 7842 9149 13070 14070 18298 19605 27447 39210 45745 54894 87569 91490 137235 175138 262707 274470 437845 525414 612983 875690 1225966 1313535 1838949 2627070 3064915 3677898 6129830 9194745 18389490
• Sum of all divisors σ(n): 51231744
• Sum of proper divisors (its aliquot sum) s(n): 32842254
• 18389490 is an abundant number, because the sum of its proper divisors (32842254) is greater than itself. Its abundance is 14452764

Bases of 18389490

• Binary: 1000110001001100111110010₂
• Hexadecimal: 0x11899F2
• Base-36: AY5F6

Squares and roots of 18389490

• 18389490 squared (18389490²) is 338173342460100
• 18389490 cubed (18389490³) is 6218835299436584349000
• The square root of 18389490 is 4288.2968647239
• The cube root of 18389490 is 263.9509493351

Scales and comparisons

• 18,389,490 seconds is equal to 30 weeks, 2 days, 20 hours, 11 minutes, 30 seconds.
• To count from 1 to 18,389,490 would take you about forty-five 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 18389490 cubic inches would be around 22 feet tall.

Recreational maths with 18389490

• 18389490 backwards is 09498381
• 18389490 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 18389490's digits is 42
• More coming soon!