642342680

Names of 642342680

• Cardinal: 642342680 can be written as Six hundred forty-two million, three hundred forty-two thousand, six hundred eighty.

Scientific notation

• Scientific notation: 6.4234268 × 10⁸

Factors of 642342680

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 573

Divisors of 642342680

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 4 5 7 8 10 14 20 28 35 40 56 70 71 79 140 142 158 280 284 316 355 395 409 497 553 568 632 710 790 818 994 1106 1420 1580 1636 1988 2045 2212 2485 2765 2840 2863 3160 3272 3976 4090 4424 4970 5530 5609 5726 8180 9940 11060 11218 11452 14315 16360 19880 22120 22436 22904 28045 28630 29039 32311 39263 44872 56090 57260 58078 64622 78526 112180 114520 116156 129244 145195 157052 161555 196315 203273 224360 226177 232312 258488 290390 314104 323110 392630 406546 452354 580780 646220 785260 813092 904708 1016365 1130885 1161560 1292440 1570520 1626184 1809416 2032730 2261770 2294081 4065460 4523540 4588162 8130920 9047080 9176324 11470405 16058567 18352648 22940810 32117134 45881620 64234268 80292835 91763240 128468536 160585670 321171340 642342680
• Sum of all divisors σ(n): 1700352000
• Sum of proper divisors (its aliquot sum) s(n): 1058009320
• 642342680 is an abundant number, because the sum of its proper divisors (1058009320) is greater than itself. Its abundance is 415666640

Bases of 642342680

• Binary: 100110010010010101111100011000₂
• Hexadecimal: 0x26495F18
• Base-36: AMFMS8

Squares and roots of 642342680

• 642342680 squared (642342680²) is 412604118549582400
• 642342680 cubed (642342680³) is 265033235288176471696832000
• The square root of 642342680 is 25344.4802669141
• The cube root of 642342680 is 862.8240854487

Scales and comparisons

• 642,342,680 seconds is equal to 20 years, 22 weeks, 12 hours, 31 minutes, 20 seconds.
• To count from 1 to 642,342,680 would take you about thirty 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 642342680 cubic inches would be around 71.9 feet tall.

Recreational maths with 642342680

• 642342680 backwards is 086243246
• 642342680 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 642342680's digits is 35
• More coming soon!