2894
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 4344
- Proper Divisor Sum (Aliquot Sum)
- 1450
- 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
- 1446
- Möbius Function
- 1
- Radical
- 2894
- Omega Function (Ω)
- 2
- 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
- 53
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- 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
- Weighted count of partitions with odd parts.at n=34A005896
- Coordination sequence T2 for Zeolite Code MFI.at n=34A008165
- If a, b in sequence, so is ab+10.at n=19A009368
- Coordination sequence T6 for Zeolite Code CON.at n=38A009873
- Coordination sequence T5 for Zeolite Code VET.at n=32A009906
- Initial pile sizes which guarantee a win for player 2 in a certain variant of Nim.at n=34A016741
- Coordination sequence T2 for Zeolite Code IFR.at n=38A024983
- Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 10 (most significant digit on right).at n=15A029503
- 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 52.at n=14A031550
- "BGK" (reversible, element, unlabeled) transform of 0,1,1,1,...at n=29A032060
- Number of partitions satisfying cn(1,5) + cn(4,5) <= cn(0,5).at n=37A039860
- Number of partitions satisfying cn(1,5) + cn(4,5) <= cn(2,5) + cn(3,5).at n=30A039894
- Numerators of continued fraction convergents to sqrt(928).at n=5A042794
- Base-5 palindromes that start with 4.at n=27A043009
- Numbers having four 2's in base 6.at n=3A043380
- Numbers k such that the string 6,5 occurs in the base 9 representation of k but not of k-1.at n=39A044310
- Numbers n such that string 9,4 occurs in the base 10 representation of n but not of n-1.at n=30A044426
- Numbers k such that string 9,4 occurs in the base 10 representation of k but not of k+1.at n=30A044807
- Numbers having, in base 14, (sum of even run lengths)=(sum of odd run lengths).at n=22A044885
- a(0)=4, a(1)=0, a(2)=0, a(3)=3; thereafter a(n) = a(n-3) + a(n-4).at n=40A050443