138402570

Names of 138402570

• Cardinal: 138402570 can be written as One hundred thirty-eight million, four hundred two thousand, five hundred seventy.

Scientific notation

• Scientific notation: 1.3840257 × 10⁸

Factors of 138402570

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 1975

Divisors of 138402570

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 5 6 10 15 30 37 67 74 111 134 185 201 222 335 370 402 555 670 1005 1110 1861 2010 2479 3722 4958 5583 7437 9305 11166 12395 14874 18610 24790 27915 37185 55830 68857 74370 124687 137714 206571 249374 344285 374061 413142 623435 688570 748122 1032855 1246870 1870305 2065710 3740610 4613419 9226838 13840257 23067095 27680514 46134190 69201285 138402570
• Sum of all divisors σ(n): 346421376
• Sum of proper divisors (its aliquot sum) s(n): 208018806
• 138402570 is an abundant number, because the sum of its proper divisors (208018806) is greater than itself. Its abundance is 69616236

Bases of 138402570

• Binary: 1000001111111101101100001010₂
• Hexadecimal: 0x83FDB0A
• Base-36: 2AEG3U

Squares and roots of 138402570

• 138402570 squared (138402570²) is 19155271382604900
• 138402570 cubed (138402570³) is 2651138788399971454593000
• The square root of 138402570 is 11764.4621636521
• The cube root of 138402570 is 517.2669351219

Scales and comparisons

• 138,402,570 seconds is equal to 4 years, 20 weeks, 5 days, 21 hours, 9 minutes, 30 seconds.
• To count from 1 to 138,402,570 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 138402570 cubic inches would be around 43.1 feet tall.

Recreational maths with 138402570

• 138402570 backwards is 075204831
• 138402570 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 138402570's digits is 30
• More coming soon!