520was the smallest number without a nBAB on 26 June 2018.MathBabbler Number Analyst (MBNA) output: ========================================= 520 is natural, counting, whole, integer 520 is even (not odd) 520 proper divisors are: 1,2,4,5,8,10,13,20,26,40,52,65,104,130,260, 520 has 15 proper divisors 520 is abundant (sum of divisors is 740; ratio: 1.42308) 520 is unhappy 520 is not a Squarefree Number: 4, 520 is composite (not prime) 520 has the prime factors: 2*2*2*5*13 (sum=24) 520 is a 13-smooth number 520 is untouchable 520 is sum of two squares ...520 = 14^2 + 18^2 ...520 = 6^2 + 22^2 520 is Recaman number 1221 520 is *not* arithmetic (A003601) 520 is the sum of 2 consecutive primes 520 = 257 + 263 520 digital root is 7 520 in octal is 01010 520 in hexadecimal is 0x208 520 in binary is 1000001000 (is evil) 520 nearest square numbers: -36...9 (484...529 [23]) sqrt(520) = 22.8035 ln(520) = 6.25383 log(520) = 2.716 520! is 1.76104e+1188 520 is 165.521 Pi years 520 is 26 scoreyears 520 written as a Roman numeral is DXX 520 is 131^2 - 129^2 and 2 * (131 + 129) 520 is a multiple of 2 & it contains a 2 (A121022) 520 is a multiple of 5 & it contains a 5 (A121025) 520 is a multiple of 20 & it contains a 20 (A121040) 520 is a multiple of 52 & it contains a 52 ______ 520 reciprocal is 0.001923076 remainders: 1,10,100,480,120,160,40,400,360,480

**Creator:** Gerald Thurman
[gthurman@gmail.com]

**Created:** 26 June 2018

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