168121728

Names of 168121728

• Cardinal: 168121728 can be written as One hundred sixty-eight million, one hundred twenty-one thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 1.68121728 × 10⁸

Factors of 168121728

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 7705

Divisors of 168121728

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 19 24 32 36 38 48 57 64 72 76 96 114 128 144 152 171 192 228 288 304 342 384 456 576 608 684 912 1152 1216 1368 1824 2432 2736 3648 5472 7296 7681 10944 15362 21888 23043 30724 46086 61448 69129 92172 122896 138258 145939 184344 245792 276516 291878 368688 437817 491584 553032 583756 737376 875634 983168 1106064 1167512 1313451 1474752 1751268 2212128 2335024 2626902 2949504 3502536 4424256 4670048 5253804 7005072 8848512 9340096 10507608 14010144 18680192 21015216 28020288 42030432 56040576 84060864 168121728
• Sum of all divisors σ(n): 509316600
• Sum of proper divisors (its aliquot sum) s(n): 341194872
• 168121728 is an abundant number, because the sum of its proper divisors (341194872) is greater than itself. Its abundance is 173073144

Bases of 168121728

• Binary: 1010000001010101010110000000₂
• Hexadecimal: 0xA055580
• Base-36: 2S3FK0

Squares and roots of 168121728

• 168121728 squared (168121728²) is 28264915425705984
• 168121728 cubed (168121728³) is 4751946423143545650020352
• The square root of 168121728 is 12966.1763060665
• The cube root of 168121728 is 551.9180722769

Scales and comparisons

• 168,121,728 seconds is equal to 5 years, 17 weeks, 6 days, 20 hours, 28 minutes, 48 seconds.
• To count from 1 to 168,121,728 would take you about eight 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 168121728 cubic inches would be around 46 feet tall.

Recreational maths with 168121728

• 168121728 backwards is 827121861
• 168121728 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 168121728's digits is 36
• More coming soon!