21400680

Names of 21400680

• Cardinal: 21400680 can be written as Twenty-one million, four hundred thousand, six hundred eighty.

Scientific notation

• Scientific notation: 2.140068 × 10⁷

Factors of 21400680

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 439

Divisors of 21400680

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 4 5 6 7 8 10 12 14 15 20 21 24 28 30 35 40 42 56 60 70 73 84 105 120 140 146 168 210 219 280 292 349 365 420 438 511 584 698 730 840 876 1022 1047 1095 1396 1460 1533 1745 1752 2044 2094 2190 2443 2555 2792 2920 3066 3490 4088 4188 4380 4886 5110 5235 6132 6980 7329 7665 8376 8760 9772 10220 10470 12215 12264 13960 14658 15330 19544 20440 20940 24430 25477 29316 30660 36645 41880 48860 50954 58632 61320 73290 76431 97720 101908 127385 146580 152862 178339 203816 254770 293160 305724 356678 382155 509540 535017 611448 713356 764310 891695 1019080 1070034 1426712 1528620 1783390 2140068 2675085 3057240 3566780 4280136 5350170 7133560 10700340 21400680
• Sum of all divisors σ(n): 74592000
• Sum of proper divisors (its aliquot sum) s(n): 53191320
• 21400680 is an abundant number, because the sum of its proper divisors (53191320) is greater than itself. Its abundance is 31790640

Bases of 21400680

• Binary: 1010001101000110001101000₂
• Hexadecimal: 0x1468C68
• Base-36: CQOVC

Squares and roots of 21400680

• 21400680 squared (21400680²) is 457989104462400
• 21400680 cubed (21400680³) is 9801278268086394432000
• The square root of 21400680 is 4626.0868993135
• The cube root of 21400680 is 277.6360504857

Scales and comparisons

• 21,400,680 seconds is equal to 35 weeks, 2 days, 16 hours, 38 minutes.
• To count from 1 to 21,400,680 would take you about twelve hours!

  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 21400680 cubic inches would be around 23.1 feet tall.

Recreational maths with 21400680

• 21400680 backwards is 08600412
• 21400680 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21400680's digits is 21
• More coming soon!