1640161728

Names of 1640161728

• Cardinal: 1640161728 can be written as One billion, six hundred forty million, one hundred sixty-one thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 1.640161728 × 10⁹

Factors of 1640161728

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 66269

Divisors of 1640161728

• Number of divisors d(n): 84
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 32 36 43 48 64 72 86 96 129 144 172 192 258 288 344 387 516 576 688 774 1032 1376 1548 2064 2752 3096 4128 6192 8256 12384 24768 66221 132442 198663 264884 397326 529768 595989 794652 1059536 1191978 1589304 2119072 2383956 2847503 3178608 4238144 4767912 5695006 6357216 8542509 9535824 11390012 12714432 17085018 19071648 22780024 25627527 34170036 38143296 45560048 51255054 68340072 91120096 102510108 136680144 182240192 205020216 273360288 410040432 546720576 820080864 1640161728
• Sum of all divisors σ(n): 4810630968
• Sum of proper divisors (its aliquot sum) s(n): 3170469240
• 1640161728 is an abundant number, because the sum of its proper divisors (3170469240) is greater than itself. Its abundance is 1530307512

Bases of 1640161728

• Binary: 1100001110000101110000111000000₂
• Hexadecimal: 0x61C2E1C0
• Base-36: R4ICW0

Squares and roots of 1640161728

• 1640161728 squared (1640161728²) is 2690130493995945984
• 1640161728 cubed (1640161728³) is 4412249079577884390112100352
• The square root of 1640161728 is 40498.9102075599
• The cube root of 1640161728 is 1179.3124712683

Scales and comparisons

• 1,640,161,728 seconds is equal to 52 years, 7 weeks, 6 days, 8 hours, 28 minutes, 48 seconds.
• To count from 1 to 1,640,161,728 would take you about one hundred four 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 1640161728 cubic inches would be around 98.3 feet tall.

Recreational maths with 1640161728

• 1640161728 backwards is 8271610461
• 1640161728 is a Harshad number.
• The number of decimal digits it has is: 10
• The sum of 1640161728's digits is 36
• More coming soon!