904
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
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 1710
- Proper Divisor Sum (Aliquot Sum)
- 806
- 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
- 448
- Möbius Function
- 0
- Radical
- 226
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 15
- 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
- neunhundertvier· ordinal: neunhundertvierste
- English
- nine hundred four· ordinal: nine hundred fourth
- Spanish
- novecientos cuatro· ordinal: 904º
- French
- neuf cent quatre· ordinal: neuf cent quatrième
- Italian
- novecentoquattro· ordinal: 904º
- Latin
- nongenti quattuor· ordinal: 904.
- Portuguese
- novecentos e quatro· ordinal: 904º
Appears in sequences
- Central polygonal numbers (the Lazy Caterer's sequence): n(n+1)/2 + 1; or, maximal number of pieces formed when slicing a pancake with n cuts.at n=42A000124
- Generalized tangent numbers d_(n,2).at n=6A000176
- Numbers beginning with letter 'n' in English.at n=16A000981
- Increasing blocks of digits of e.at n=6A001114
- A generalized Fibonacci sequence.at n=39A001584
- a(n) = ceiling(1000*log_10(n)).at n=7A004227
- Length of n-th term in Look and Say sequences A005150 and A007651.at n=23A005341
- Number of paraffins.at n=14A005997
- Cald's sequence: a(n+1) = a(n) - prime(n) if that value is positive and new, otherwise a(n) + prime(n) if new, otherwise 0; start with a(1)=1.at n=94A006509
- Worst cases for Pierce expansions (numerators).at n=18A006537
- Number of elements (a b, c d) in GL(2,Z) with |det| = 1, trace <= n and 0 <= a <= {b, c} <= d.at n=45A007295
- Add 8, then reverse digits!.at n=5A007399
- Positive even numbers that are not the sum of a pair of twin primes.at n=14A007534
- Number of M-sequences from multicomplexes on at most 6 variables with no monomial of degree more than n-1.at n=4A007625
- Triangle a(n,k) of number of M-sequences read by antidiagonals.at n=59A007723
- Coordination sequence T1 for Zeolite Code BPH.at n=23A008055
- Coordination sequence T2 for Zeolite Code EPI.at n=19A008091
- Coordination sequence T4 for Zeolite Code MEI.at n=22A008149
- Coordination sequence for diamond.at n=19A008253
- Coordination sequence T1 for Coesite.at n=16A008267