2622
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 12
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 5760
- Proper Divisor Sum (Aliquot Sum)
- 3138
- 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
- 792
- Möbius Function
- 1
- Radical
- 2622
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 4
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
- 102
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- yes
- 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
Appears in sequences
- Numbers k such that 5*2^k - 1 is prime.at n=26A001770
- Prime numbers of measurement.at n=47A002049
- Pentagonal numbers written backwards.at n=39A004163
- Number of 4-colorings of cyclic group of order n.at n=9A007687
- Expansion of (1+x^10)/((1-x)*(1-x^2)*(1-x^3)*(1-x^4)).at n=57A008771
- Coordination sequence T3 for Zeolite Code -WEN.at n=37A009864
- Coordination sequence T6 for Zeolite Code CON.at n=36A009873
- a(n) = floor( n*(n-1)*(n-2)*(n-3)/28 ).at n=18A011938
- Numbers k such that sigma(k) = sigma(k+10).at n=11A015880
- Number of integer points (x,y,z) at distance <= 0.5 from sphere of radius n.at n=15A016728
- Population of "Triangle" cellular automaton at n-th generation.at n=26A018189
- a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (Lucas numbers), t = (odd natural numbers).at n=15A025093
- Fractional part of square root of a(n) starts with 2: first term of runs.at n=48A034108
- Dirichlet convolution of triangular numbers with themselves.at n=37A034715
- Coordination sequence T3 for Zeolite Code STT.at n=34A038426
- Numbers having three 0's in base 6.at n=34A043371
- Numbers having three 3's in base 9.at n=23A043467
- Numbers having three 2's in base 10.at n=25A043499
- Numbers whose base-3 representation has exactly 8 runs.at n=24A043588
- Numbers whose number of runs in base 3 is congruent to 1 (mod 7).at n=38A043792