399985690

Names of 399985690

• Cardinal: 399985690 can be written as Three hundred ninety-nine million, nine hundred eighty-five thousand, six hundred ninety.

Scientific notation

• Scientific notation: 3.9998569 × 10⁸

Factors of 399985690

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 145

Divisors of 399985690

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 5 10 13 17 26 29 34 58 65 79 85 130 145 158 170 221 290 377 395 442 493 754 790 986 1027 1105 1343 1885 2054 2210 2291 2465 2686 3770 4582 4930 5135 6241 6409 6715 10270 11455 12482 12818 13430 17459 22910 29783 31205 32045 34918 38947 59566 62410 64090 77894 81133 87295 106097 148915 162266 174590 180989 194735 212194 297830 361978 389470 405665 506311 530485 811330 904945 1012622 1060970 1379261 1809890 2352857 2531555 2758522 3076813 4705714 5063110 6153626 6896305 11764285 13792610 15384065 23528570 30768130 39998569 79997138 199992845 399985690
• Sum of all divisors σ(n): 860161680
• Sum of proper divisors (its aliquot sum) s(n): 460175990
• 399985690 is an abundant number, because the sum of its proper divisors (460175990) is greater than itself. Its abundance is 60190300

Bases of 399985690

• Binary: 10111110101110100110000011010₂
• Hexadecimal: 0x17D74C1A
• Base-36: 6M52XM

Squares and roots of 399985690

• 399985690 squared (399985690²) is 159988552204776100
• 399985690 cubed (399985690³) is 63993131445728389654009000
• The square root of 399985690 is 19999.6422468003
• The cube root of 399985690 is 736.7975132081

Scales and comparisons

• 399,985,690 seconds is equal to 12 years, 37 weeks, 2 days, 11 hours, 8 minutes, 10 seconds.
• To count from 1 to 399,985,690 would take you about nineteen 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 399985690 cubic inches would be around 61.4 feet tall.

Recreational maths with 399985690

• 399985690 backwards is 096589993
• 399985690 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 399985690's digits is 58
• More coming soon!