804
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 12
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 1904
- Proper Divisor Sum (Aliquot Sum)
- 1100
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 264
- Möbius Function
- 0
- Radical
- 402
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 3
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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 20
- 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
- achthundertvier· ordinal: achthundertvierste
- English
- eight hundred four· ordinal: eight hundred fourth
- Spanish
- ochocientos cuatro· ordinal: 804º
- French
- huit cent quatre· ordinal: huit cent quatrième
- Italian
- ottocentoquattro· ordinal: 804º
- Latin
- octingenti quattuor· ordinal: 804.
- Portuguese
- oitocentos e quatro· ordinal: 804º
Appears in sequences
- Number of partitions into non-integral powers.at n=8A000339
- Number of stereoisomeric paraffins with n carbon atoms.at n=11A000626
- a(n) is the number of conjugacy classes in the alternating group A_n.at n=23A000702
- Numbers beginning with letter 'e' in English.at n=17A000873
- Schur's 1926 partition theorem: number of partitions of n into parts 6n+1 or 6n-1.at n=57A003105
- Self numbers divisible by sum of their digits (or, self numbers which are also Harshad numbers).at n=24A003219
- Record values in A005210.at n=32A005211
- a(n) = (n+1)*(n^2+n+2)/2; g.f.: (1 + 2*x^2) / (1 - x)^4.at n=11A006000
- Number of entries in first n rows of Pascal's triangle not divisible by 3.at n=66A006048
- Numbers n such that n^32 + 1 is prime.at n=20A006315
- Number of subwords of length n in infinite word generated by a -> aab, b -> b.at n=43A006697
- Bond percolation series for square lattice.at n=11A006727
- a(n) = a(n-2) + a(n-3), with a(0) = 0, a(1) = 1, a(2) = 4.at n=23A007309
- Shifts left when inverse Moebius transform applied twice.at n=22A007557
- Impractical numbers: even abundant numbers (A173490) that are not practical(2) (A007620).at n=44A007621
- Coordination sequence T5 for Zeolite Code BOG.at n=20A008053
- Coordination sequence T2 for Zeolite Code DAC.at n=18A008068
- Coordination sequence T2 for Zeolite Code LEV.at n=21A008128
- Coordination sequence T3 for Zeolite Code STI.at n=19A008236
- Coordination sequence for FeS2-Pyrite, Fe position.at n=13A009957