260
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 8
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 588
- Proper Divisor Sum (Aliquot Sum)
- 328
- 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
- 96
- Möbius Function
- 0
- Radical
- 130
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 29
- 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
- zweihundertsechzig· ordinal: zweihundertsechzigste
- English
- two hundred sixty· ordinal: two hundred sixtieth
- Spanish
- doscientos sesenta· ordinal: 260º
- French
- deux cent soixante· ordinal: deux cent soixantième
- Italian
- duecentosessanta· ordinal: 260º
- Latin
- ducenti sexaginta· ordinal: 260.
- Portuguese
- duzentos e sessenta· ordinal: 260º
Appears in sequences
- Number of ways of making change for n cents using coins of 1, 2, 5, 10 cents.at n=45A000008
- Restricted permutations.at n=8A000496
- Number of nonnegative solutions to x^2 + y^2 + z^2 <= n.at n=51A000606
- Number of glycols with n carbon atoms.at n=6A000634
- Moser-de Bruijn sequence: sums of distinct powers of 4.at n=18A000695
- Expansion of Product_{k>=1} (1 - x^k)^16.at n=4A000739
- n! never ends in this many 0's.at n=50A000966
- Numbers that are divisible by at least three different primes.at n=45A000977
- Number of red-black rooted trees with n-1 internal nodes.at n=11A001131
- a(n) = sigma_2(n): sum of squares of divisors of n.at n=14A001157
- Number of ways of making change for n cents using coins of 1, 2, 5, 10, 50, 100 cents.at n=45A001312
- Generalized pentagonal numbers: m*(3*m - 1)/2, m = 0, +-1, +-2, +-3, ....at n=26A001318
- Maximal number of unattacked squares with n queens on n X n board (answers for n >= 17 only probable).at n=24A001366
- Number of stacks, or arrangements of n pennies in contiguous rows, each touching 2 in row below.at n=16A001524
- Winning moves in Fibonacci nim.at n=45A001581
- A Fielder sequence: a(n) = a(n-1) + a(n-2) - a(n-6), n >= 7.at n=12A001635
- Fibonomial coefficients: a(n) = F(n+1) * F(n+2) * F(n+3)/2, where F() = Fibonacci numbers A000045.at n=4A001655
- Fibonomial coefficients.at n=3A001656
- Expansion of g.f. x/((1 - x)^2*(1 - x^3)).at n=38A001840
- v-pile positions of the 4-Wythoff game with i=3.at n=49A001968