18909072

Names of 18909072

• Cardinal: 18909072 can be written as Eighteen million, nine hundred nine thousand and seventy-two.

Scientific notation

• Scientific notation: 1.8909072 × 10⁷

Factors of 18909072

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 62

Divisors of 18909072

• Number of divisors d(n): 240
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 13 14 16 18 21 24 26 27 28 36 37 39 42 48 52 54 56 63 72 74 78 84 91 104 108 111 112 117 126 144 148 156 168 169 182 189 208 216 222 234 252 259 273 296 312 333 336 338 351 364 378 432 444 468 481 504 507 518 546 592 624 666 676 702 728 756 777 819 888 936 962 999 1008 1014 1036 1092 1183 1332 1352 1404 1443 1456 1512 1521 1554 1638 1776 1872 1924 1998 2028 2072 2184 2331 2366 2457 2664 2704 2808 2886 3024 3042 3108 3276 3367 3549 3848 3996 4056 4144 4329 4368 4563 4662 4732 4914 5328 5616 5772 6084 6216 6253 6552 6734 6993 7098 7696 7992 8112 8658 9126 9324 9464 9828 10101 10647 11544 12168 12432 12506 12987 13104 13468 13986 14196 15984 17316 18252 18648 18759 18928 19656 20202 21294 23088 24336 25012 25974 26936 27972 28392 30303 31941 34632 36504 37296 37518 39312 40404 42588 43771 50024 51948 53872 55944 56277 56784 60606 63882 69264 73008 75036 80808 85176 87542 90909 100048 103896 111888 112554 121212 127764 131313 150072 161616 168831 170352 175084 181818 207792 225108 242424 255528 262626 300144 337662 350168 363636 393939 450216 484848 511056 525252 675324 700336 727272 787878 900432 1050504 1181817 1350648 1454544 1575756 2101008 2363634 2701296 3151512 4727268 6303024 9454536 18909072
• Sum of all divisors σ(n): 68983680
• Sum of proper divisors (its aliquot sum) s(n): 50074608
• 18909072 is an abundant number, because the sum of its proper divisors (50074608) is greater than itself. Its abundance is 31165536

Bases of 18909072

• Binary: 1001000001000011110010000₂
• Hexadecimal: 0x1208790
• Base-36: B9AC0

Squares and roots of 18909072

• 18909072 squared (18909072²) is 357553003901184
• 18909072 cubed (18909072³) is 6760995494583769141248
• The square root of 18909072 is 4348.4562778071
• The cube root of 18909072 is 266.4138130975

Scales and comparisons

• 18,909,072 seconds is equal to 31 weeks, 1 day, 20 hours, 31 minutes, 12 seconds.
• To count from 1 to 18,909,072 would take you about forty-six weeks!

  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 18909072 cubic inches would be around 22.2 feet tall.

Recreational maths with 18909072

• 18909072 backwards is 27090981
• 18909072 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 18909072's digits is 36
• More coming soon!