1894
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
- 4
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 2844
- Proper Divisor Sum (Aliquot Sum)
- 950
- 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
- 946
- Möbius Function
- 1
- Radical
- 1894
- 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
- 37
- Smith Number
- yes
- 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
- A generalized Fibonacci sequence.at n=43A001584
- Number of 4-line partitions of n decreasing across rows.at n=17A003292
- Number of (undirected) Hamiltonian paths in the n-ladder graph K_2 X P_n.at n=43A003682
- Coordination sequence T3 for Zeolite Code BOG.at n=31A008051
- Theta series of direct sum of f.c.c. and b.c.c. lattices.at n=36A008664
- sec(arctan(x)+sin(x))=1+4/2!*x^2+56/4!*x^4+1894/6!*x^6+117288/8!*x^8...at n=3A012983
- Apply partial sum operator thrice to binary rooted tree numbers.at n=10A014169
- a(n) = n^2 + n + 2.at n=43A014206
- a(n) = (tau(n^n)+n-1)/n.at n=41A016012
- Expansion of 1/(1-x^10-x^11-x^12-x^13-x^14-x^15-x^16-x^17-x^18-x^19-x^20).at n=60A017896
- Coordination sequence T2 for Zeolite Code SAO.at n=34A019572
- Numbers k such that the continued fraction for sqrt(k) has period 78.at n=0A020417
- Convolution of Fibonacci numbers and primes.at n=11A023615
- s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = A023532, t = (1, p(1), p(2), ...).at n=40A024369
- a(n) = least m such that if r and s in {h/(1 + h^2): h = 1,2,...,n} satisfy r < s, then r < k/m < s for some integer k.at n=48A024828
- a(n) = sum of the numbers between the two n's in A026366.at n=22A026369
- Number of nonisomorphic commutative idempotent groupoids with a nontrivial symmetry.at n=5A030259
- Sum of terms in period of continued fraction for sqrt(a(n)) increases.at n=47A031402
- 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 42.at n=12A031540
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 34 ones.at n=1A031802