620
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 8
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 1344
- Proper Divisor Sum (Aliquot Sum)
- 724
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 240
- Möbius Function
- 0
- Radical
- 310
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 3
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 87
- Smith Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Names
- German
- sechshundertzwanzig· ordinal: sechshundertzwanzigste
- English
- six hundred twenty· ordinal: six hundred twentieth
- Spanish
- seiscientos veinte· ordinal: 620º
- French
- six cent vingt· ordinal: six cent vingtième
- Italian
- seicentoventi· ordinal: 620º
- Latin
- sescenti viginti· ordinal: 620.
- Portuguese
- seiscentos e vinte· ordinal: 620º
Appears in sequences
- Number of partitions of n, with three kinds of 1 and 2 and two kinds of 3,4,5,....at n=8A000714
- Numbers beginning with letter 's' in English.at n=44A000870
- The coding-theoretic function A(n,4,3).at n=61A001839
- Squares written in base 8.at n=19A002441
- A nonlinear recurrence.at n=26A003073
- Numbers that are the sum of 12 positive 5th powers.at n=29A003357
- Number of one-sided hexagonal polyominoes with n cells.at n=6A006535
- Let P(n) of a sequence s(1),s(2),s(3),... be obtained by leaving s(1),...,s(n) fixed and reversing every n consecutive terms thereafter; apply P(2) to 1,2,3,... to get PS(2), then apply P(3) to PS(2) to get PS(3), then apply P(4) to PS(3), etc. This sequence is the limit of PS(n).at n=50A007062
- McKay-Thompson series of class 6D for Monster.at n=9A007257
- Apocalyptic powers: 2^a(n) contains 666.at n=44A007356
- Numbers k such that phi(x) = k has exactly 3 solutions.at n=25A007367
- Numbers k such that sigma(x) = k has exactly 3 solutions.at n=17A007372
- Dodecahedral surface numbers: a(0)=0, a(1)=1, a(2)=20, thereafter 2*((3*n-7)^2 + 21).at n=8A007589
- a(n) = a(n-1) + sum of digits of a(n-1), a(1) = 5.at n=52A007618
- Coordination sequence T3 for Zeolite Code ATS.at n=18A008040
- Coordination sequence T2 for Zeolite Code BIK.at n=15A008048
- Coordination sequence T2 for Zeolite Code NAT.at n=17A008204
- Coordination sequence T4 for Zeolite Code NES.at n=16A008208
- Coordination sequence T1 for Zeolite Code PHI.at n=18A008227
- Coordination sequence T2 for Zeolite Code PHI.at n=18A008228