184
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 360
- Proper Divisor Sum (Aliquot Sum)
- 176
- 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
- 88
- Möbius Function
- 0
- Radical
- 46
- 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
- 18
- 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
- einshundertvierundachtzig· ordinal: einshundertvierundachtzigste
- English
- one hundred eighty-four· ordinal: one hundred eighty-fourth
- Spanish
- ciento ochenta y cuatro· ordinal: 184º
- French
- cent quatre-vingt-quatre· ordinal: cent quatre-vingt-quatrième
- Italian
- centoottantaquattro· ordinal: 184º
- Latin
- centum octoginta quattuor· ordinal: 184.
- Portuguese
- cento e oitenta e quatro· ordinal: 184º
Appears in sequences
- Generalized tangent numbers d(n,1).at n=54A000061
- a(n) = Sum_{k=1..n-1} k^3*sigma(k)*sigma(n-k).at n=3A000499
- Number of nonnegative solutions to x^2 + y^2 + z^2 <= n.at n=40A000606
- Number of monosubstituted alkanes C(n-1)H(2n-1)-X with n-1 carbon atoms that are not stereoisomers.at n=12A000621
- Number of stochastic matrices of integers.at n=6A000987
- Numbers k such that sum of squares of k consecutive integers >= 1 is a square.at n=22A001032
- a(n) = floor(n*log((14/11)*n^(10/9))).at n=41A001195
- a(n) is the number of partitions of n into at most 3 parts; also partitions of n+3 in which the greatest part is 3; also number of unlabeled multigraphs with 3 nodes and n edges.at n=44A001399
- Number of transpositions needed to generate permutations of length n.at n=4A001540
- Numbers k such that 5*2^k - 1 is prime.at n=12A001770
- Triangular numbers plus quarter-squares: n*(n+1)/2 + floor((n+1)^2/4) (i.e., A000217(n) + A002620(n+1)).at n=15A001859
- a(2n) = a(2n-1) + 2a(2n-2), a(2n+1) = a(2n) + a(2n-1), with a(1) = 2 and a(2) = 3.at n=8A001882
- A Beatty sequence: a(n) = floor(n*(2 + sqrt(2))).at n=53A001952
- v-pile positions of the 4-Wythoff game with i=1.at n=35A001964
- Numbers congruent to {2, 4, 8, 16} (mod 20).at n=37A002081
- Generalized divisor function. Number of partitions of n with exactly three part sizes.at n=12A002134
- a(1) = 3; for n > 1, a(n) = 4*phi(n); given a rational number r = p/q, where q>0, (p,q)=1, define its height to be max{|p|,q}; then a(n) = number of rational numbers of height n.at n=46A002246
- Related to representation as sums of squares.at n=11A002292
- Let p = A007645(n) be the n-th generalized cuban prime and write p^2 = x^2 + 3*y^2 with y > 0; a(n) = y.at n=49A002368
- Expansion of a modular function for Gamma_0(21).at n=10A002511