1946
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 3360
- Proper Divisor Sum (Aliquot Sum)
- 1414
- 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
- 828
- Möbius Function
- -1
- Radical
- 1946
- Omega Function (Ω)
- 3
- 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
- 99
- 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
- a(n) = 1000*log(n) rounded to the nearest integer.at n=6A004241
- a(n) = ceiling(1000*log(n)).at n=6A004242
- a(n) = n*(5*n - 1)/2.at n=28A005476
- a(n) = 6*n^2 + 2 for n > 0, a(0)=1.at n=18A005897
- Number of Q-graphs rooted at a polygon.at n=6A007169
- a(n) = a(n-1) + a(n-1-(number of odd terms so far)).at n=26A007604
- Expansion of (1-x^6) / (1-x)^6.at n=9A008488
- Year of birth of n-th President of U.S.A.at n=42A008745
- Year of birth of n-th President of U.S.A.at n=41A008745
- Year of birth of n-th President of U.S.A.at n=44A008745
- Coordination sequence T1 for Zeolite Code VSV.at n=28A009914
- a(0) = 1, a(n) = 24*n^2 + 2 for n>0.at n=9A010014
- a(n) = floor( n*(n-1)*(n-2)/26 ).at n=38A011908
- Pisot sequence T(4,6), a(n) = floor(a(n-1)^2/a(n-2)).at n=22A020747
- Pisot sequence T(6,9), a(n) = floor(a(n-1)^2/a(n-2)).at n=21A020751
- Coordination sequence for root lattice B_7.at n=2A022149
- Convolution of A023532 and A001950.at n=42A023603
- T(2n,n), T given by A026659.at n=6A026660
- T(n,[ n/2 ]), T given by A026659.at n=12A026665
- Number of partitions of n into an odd number of parts, the least being 4; also, a(n+4) = number of partitions of n into an even number of parts, each >=4.at n=55A027190