1438
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 2160
- Proper Divisor Sum (Aliquot Sum)
- 722
- 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
- 718
- Möbius Function
- 1
- Radical
- 1438
- Omega Function (Ω)
- 2
- 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
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 52
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- 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
- Colored series-parallel networks.at n=5A001574
- Numbers k such that 5*2^k - 1 is prime.at n=18A001770
- Smallest number of complexity n: smallest number requiring n 1's to build using + and *.at n=24A005520
- 1 + (sum of first n odd primes - n)/2.at n=38A005521
- Number of Twopins positions.at n=17A005690
- Positions of remoteness 6 in Beans-Don't-Talk.at n=31A005694
- Coordination sequence T2 for Zeolite Code LEV.at n=28A008128
- 3x+1 sequence starting at 63.at n=55A008874
- 3x+1 sequence starting at 95.at n=53A008875
- 3x+1 sequence starting at 27.at n=59A008884
- Numbers n such that phi(n) + 8 | sigma(n + 8), where phi = A000010 and sigma = A000203.at n=47A015787
- Numbers k such that the continued fraction for sqrt(k) has period 24.at n=19A020363
- Position of n^2 + 5 in A000408.at n=41A024801
- a(n) = Sum_{k=2..n} k*floor(n/k).at n=40A024917
- Numbers whose least quadratic nonresidue (A020649) is 11.at n=7A025024
- (d(n)-r(n))/2, where d = A008778 and r is the periodic sequence with fundamental period (1,1,0,1).at n=22A026052
- a(n) = sum of the numbers between the two n's in A026338.at n=40A026341
- a(n) = n-th largest even number in array T given by A027170.at n=28A027183
- a(n) = (n+3)^2 - 6.at n=35A028878
- [ exp(9/13)*n! ].at n=5A030925