2418
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 5376
- Proper Divisor Sum (Aliquot Sum)
- 2958
- 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
- 720
- Möbius Function
- 1
- Radical
- 2418
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 4
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
- 58
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- yes
- 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
Appears in sequences
- Unitary-sociable numbers (smallest member of each cycle).at n=2A000173
- Number of partitions of n into at most 5 parts.at n=44A001401
- a(n) = Sum_{t=0..n} g(t)*g(n-t) where g(t) = A002121(t).at n=43A002122
- a(n) = n*(5*n+1)/2.at n=31A005475
- Spiral sieve using Fibonacci numbers.at n=16A005624
- Coefficients of the '2nd-order' mock theta function A(q).at n=27A006304
- Numbers n such that n^32 + 1 is prime.at n=44A006315
- McKay-Thompson series of class 6b for the Monster group.at n=4A007261
- Sum of divisors of superabundant numbers (A004394).at n=13A007626
- Coordination sequence T6 for Zeolite Code BOG.at n=35A008054
- Coordination sequence T5 for Zeolite Code NON.at n=30A008216
- Coordination sequence for 4-dimensional RR-centered di-isohexagonal orthogonal lattice.at n=6A008528
- Pisot sequence E(10,22), a(n) = floor( a(n-1)^2/a(n-2)+1/2 ).at n=7A014008
- Numbers n such that sigma(phi(n)) = n.at n=6A018784
- Coordination sequence T4 for Zeolite Code CGF.at n=34A019454
- Number of partitions of n into distinct parts >= 2.at n=52A025147
- a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ...+ a(n-1)*a(1) for n >= 4, with initial terms 1,2,1.at n=8A025263
- a(n) = (d(n)-r(n))/2, where d = A026046 and r is the periodic sequence with fundamental period (0,1,0,1).at n=20A026047
- a(n) = (d(n)-r(n))/2, where d = A026066 and r is the periodic sequence with fundamental period (1,0,0,0).at n=19A026067
- Number of partitions of n in which the greatest part is 5.at n=49A026811