67145728

Names of 67145728

• Cardinal: 67145728 can be written as Sixty-seven million, one hundred forty-five thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 6.7145728 × 10⁷

Factors of 67145728

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 112

Divisors of 67145728

• Number of divisors d(n): 78
• Complete list of divisors:
  1 2 4 8 13 16 26 32 52 64 97 104 128 169 194 208 256 338 388 416 512 676 776 832 1024 1261 1352 1552 1664 2048 2522 2704 3104 3328 4096 5044 5408 6208 6656 10088 10816 12416 13312 16393 20176 21632 24832 26624 32786 40352 43264 49664 53248 65572 80704 86528 99328 131144 161408 173056 198656 262288 322816 346112 397312 524576 645632 692224 1049152 1291264 2098304 2582528 4196608 5165056 8393216 16786432 33572864 67145728
• Sum of all divisors σ(n): 146897394
• Sum of proper divisors (its aliquot sum) s(n): 79751666
• 67145728 is an abundant number, because the sum of its proper divisors (79751666) is greater than itself. Its abundance is 12605938

Bases of 67145728

• Binary: 100000000001001000000000000₂
• Hexadecimal: 0x4009000
• Base-36: 13Z5Z4

Squares and roots of 67145728

• 67145728 squared (67145728²) is 4508548788649984
• 67145728 cubed (67145728³) is 302729790637421312868352
• The square root of 67145728 is 8194.2496910943
• The cube root of 67145728 is 406.4490651077

Scales and comparisons

• 67,145,728 seconds is equal to 2 years, 7 weeks, 3 hours, 35 minutes, 28 seconds.
• To count from 1 to 67,145,728 would take you about three 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 67145728 cubic inches would be around 33.9 feet tall.

Recreational maths with 67145728

• 67145728 backwards is 82754176
• The number of decimal digits it has is: 8
• The sum of 67145728's digits is 40
• More coming soon!