640786432

Names of 640786432

• Cardinal: 640786432 can be written as Six hundred forty million, seven hundred eighty-six thousand, four hundred thirty-two.

Scientific notation

• Scientific notation: 6.40786432 × 10⁸

Factors of 640786432

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 573

Divisors of 640786432

• Number of divisors d(n): 112
• Complete list of divisors:
  1 2 4 8 11 13 16 22 26 32 44 52 64 88 104 128 143 176 208 256 286 352 416 512 547 572 704 832 1024 1094 1144 1408 1664 2048 2188 2288 2816 3328 4096 4376 4576 5632 6017 6656 7111 8192 8752 9152 11264 12034 13312 14222 17504 18304 22528 24068 26624 28444 35008 36608 45056 48136 53248 56888 70016 73216 78221 90112 96272 106496 113776 140032 146432 156442 192544 227552 280064 292864 312884 385088 455104 560128 585728 625768 770176 910208 1120256 1171456 1251536 1540352 1820416 2240512 2503072 3080704 3640832 4481024 5006144 6161408 7281664 10012288 12322816 14563328 20024576 24645632 29126656 40049152 49291264 58253312 80098304 160196608 320393216 640786432
• Sum of all divisors σ(n): 1508284512
• Sum of proper divisors (its aliquot sum) s(n): 867498080
• 640786432 is an abundant number, because the sum of its proper divisors (867498080) is greater than itself. Its abundance is 226711648

Bases of 640786432

• Binary: 100110001100011010000000000000₂
• Hexadecimal: 0x2631A000
• Base-36: ALI9Z4

Squares and roots of 640786432

• 640786432 squared (640786432²) is 410607251435290624
• 640786432 cubed (640786432³) is 263111555600546757836013568
• The square root of 640786432 is 25313.7597365543
• The cube root of 640786432 is 862.1267141093

Scales and comparisons

• 640,786,432 seconds is equal to 20 years, 19 weeks, 3 days, 12 hours, 13 minutes, 52 seconds.
• To count from 1 to 640,786,432 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 640786432 cubic inches would be around 71.8 feet tall.

Recreational maths with 640786432

• 640786432 backwards is 234687046
• The number of decimal digits it has is: 9
• The sum of 640786432's digits is 40
• More coming soon!