2776
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 22
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 5220
- Proper Divisor Sum (Aliquot Sum)
- 2444
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 1384
- Möbius Function
- 0
- Radical
- 694
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 2
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
- 128
- Smith Number
- no
- Vampire 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
Appears in sequences
- Coordination sequence T1 for Zeolite Code ATS.at n=38A008038
- Coordination sequence T4 for Zeolite Code DDR.at n=33A008074
- Coordination sequence T2 for Zeolite Code YUG.at n=34A008248
- Coordination sequence T2 for Zeolite Code VET.at n=32A009903
- Coordination sequence T3 for Zeolite Code VSV.at n=35A009916
- Coordination sequence T1 for Zeolite Code TER.at n=35A016433
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite RON = Roggianite Ca16[Be8Al16Si32O104(OH)16].19H2O starting with a T4 atom.at n=14A019216
- Numbers k such that the continued fraction for sqrt(k) has period 46.at n=16A020385
- Expansion of Product_{m>=1} (1+x^m)^8.at n=6A022573
- Numbers k such that Fib(k) == -21 (mod k).at n=27A023168
- Number of partitions of n into prime power parts (1 included); number of nonisomorphic Abelian subgroups of symmetric group S_n.at n=30A023893
- a(n) = least m such that if r and s in {1/1, 1/3, 1/5,..., 1/(2n-1)} satisfy r < s, then r < k/m < s for some integer k.at n=42A024819
- Coordination sequence T1 for Zeolite Code CGS.at n=39A027365
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 13.at n=24A031511
- Dirichlet convolution of Fibonacci numbers with Primes (with 1).at n=17A034746
- Numbers whose base-14 representation has exactly 4 runs.at n=16A043665
- Numbers k such that string 3,3 occurs in the base 8 representation of k but not of k-1.at n=43A044214
- Numbers n such that string 2,4 occurs in the base 9 representation of n but not of n-1.at n=38A044273
- Numbers n such that string 7,6 occurs in the base 10 representation of n but not of n-1.at n=30A044408
- Numbers n such that string 2,4 occurs in the base 9 representation of n but not of n+1.at n=38A044654