129397770

Names of 129397770

• Cardinal: 129397770 can be written as One hundred twenty-nine million, three hundred ninety-seven thousand, seven hundred seventy.

Scientific notation

• Scientific notation: 1.2939777 × 10⁸

Factors of 129397770

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 411

Divisors of 129397770

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 5 6 9 10 15 18 23 27 30 45 46 54 67 69 90 115 134 135 138 201 207 230 270 311 335 345 402 414 603 621 622 670 690 933 1005 1035 1206 1242 1541 1555 1809 1866 2010 2070 2799 3015 3082 3105 3110 3618 4623 4665 5598 6030 6210 7153 7705 8397 9045 9246 9330 13869 13995 14306 15410 16794 18090 20837 21459 23115 27738 27990 35765 41607 41674 41985 42918 46230 62511 64377 69345 71530 83214 83970 104185 107295 125022 128754 138690 187533 193131 208035 208370 214590 312555 321885 375066 386262 416070 479251 562599 625110 643770 937665 958502 965655 1125198 1437753 1875330 1931310 2396255 2812995 2875506 4313259 4792510 5625990 7188765 8626518 12939777 14377530 21566295 25879554 43132590 64698885 129397770
• Sum of all divisors σ(n): 366612480
• Sum of proper divisors (its aliquot sum) s(n): 237214710
• 129397770 is an abundant number, because the sum of its proper divisors (237214710) is greater than itself. Its abundance is 107816940

Bases of 129397770

• Binary: 111101101100111010000001010₂
• Hexadecimal: 0x7B6740A
• Base-36: 251FYI

Squares and roots of 129397770

• 129397770 squared (129397770²) is 16743782880972900
• 129397770 cubed (129397770³) is 2166608166162068690433000
• The square root of 129397770 is 11375.3140615985
• The cube root of 129397770 is 505.7962408729

Scales and comparisons

• 129,397,770 seconds is equal to 4 years, 5 weeks, 6 days, 15 hours, 49 minutes, 30 seconds.
• To count from 1 to 129,397,770 would take you about six 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 129397770 cubic inches would be around 42.1 feet tall.

Recreational maths with 129397770

• 129397770 backwards is 077793921
• 129397770 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 129397770's digits is 45
• More coming soon!