844
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 1484
- Proper Divisor Sum (Aliquot Sum)
- 640
- 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
- 420
- Möbius Function
- 0
- Radical
- 422
- Omega Function (Ω)
- 3
- 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
- 41
- 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
- achthundertvierundvierzig· ordinal: achthundertvierundvierzigste
- English
- eight hundred forty-four· ordinal: eight hundred forty-fourth
- Spanish
- ochocientos cuarenta y cuatro· ordinal: 844º
- French
- huit cent quarante-quatre· ordinal: huit cent quarante-quatrième
- Italian
- ottocentoquarantaquattro· ordinal: 844º
- Latin
- octingenti quadraginta quattuor· ordinal: 844.
- Portuguese
- oitocentos e quarenta e quatro· ordinal: 844º
Appears in sequences
- a(n) = a(n-1) + a(n-2) - 1 for n > 1, a(0)=3, a(1)=2.at n=14A001612
- Primes multiplied by 4.at n=46A001749
- Numbers k such that (k^2 + k + 1)/21 is prime.at n=40A002644
- Cluster series for square lattice.at n=8A003203
- Number of unrooted achiral trees with n nodes.at n=20A003244
- Number of unrooted triangulations with reflection symmetry of a quadrilateral with n internal nodes.at n=7A005505
- Number of partitions of 4*n into powers of 4.at n=58A005705
- Coordination sequence T1 for Zeolite Code ABW and ATN.at n=20A008000
- Coordination sequence T3 for Zeolite Code AFR.at n=22A008021
- Coordination sequence T1 for Zeolite Code ATS.at n=21A008038
- Coordination sequence T4 for Zeolite Code MTT.at n=18A008192
- Coordination sequence T2 for Milarite.at n=18A008257
- Coordination sequence T5 for Zeolite Code RUT.at n=19A009901
- Coordination sequence T3 for Zeolite Code VSV.at n=18A009916
- List of totally balanced sequences of 2n binary digits written in base 10. Binary expansion of each term contains n 0's and n 1's and reading from left to right (the most significant to the least significant bit), the number of 0's never exceeds the number of 1's.at n=43A014486
- Sum of (Gaussian) q-binomial coefficients for q=-21.at n=3A015190
- Sum of Gaussian binomial coefficients for q=20.at n=3A015211
- Divisors of 844.at n=5A018677
- Number of lines through exactly 8 points of an n X n grid of points.at n=37A018815
- Number of lines through exactly 10 points of an n X n grid of points.at n=55A018817