641400990

Names of 641400990

• Cardinal: 641400990 can be written as Six hundred forty-one million, four hundred thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 6.4140099 × 10⁸

Factors of 641400990

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 3277

Divisors of 641400990

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 5 6 10 15 17 30 34 51 85 102 170 255 449 510 898 1347 2245 2694 2801 4490 5602 6735 7633 8403 13470 14005 15266 16806 22899 28010 38165 42015 45798 47617 76330 84030 95234 114495 142851 228990 238085 285702 476170 714255 1257649 1428510 2515298 3772947 6288245 7545894 12576490 18864735 21380033 37729470 42760066 64140099 106900165 128280198 213800330 320700495 641400990
• Sum of all divisors σ(n): 1634126400
• Sum of proper divisors (its aliquot sum) s(n): 992725410
• 641400990 is an abundant number, because the sum of its proper divisors (992725410) is greater than itself. Its abundance is 351324420

Bases of 641400990

• Binary: 100110001110110000000010011110₂
• Hexadecimal: 0x263B009E
• Base-36: ALVG66

Squares and roots of 641400990

• 641400990 squared (641400990²) is 411395229972980100
• 641400990 cubed (641400990³) is 263869307785947109390299000
• The square root of 641400990 is 25325.8956406283
• The cube root of 641400990 is 862.4022388671

Scales and comparisons

• 641,400,990 seconds is equal to 20 years, 20 weeks, 3 days, 14 hours, 56 minutes, 30 seconds.
• To count from 1 to 641,400,990 would take you about thirty years!

  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 641400990 cubic inches would be around 71.9 feet tall.

Recreational maths with 641400990

• 641400990 backwards is 099004146
• The number of decimal digits it has is: 9
• The sum of 641400990's digits is 33
• More coming soon!