3838
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 22
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 6120
- Proper Divisor Sum (Aliquot Sum)
- 2282
- 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
- 1800
- Möbius Function
- -1
- Radical
- 3838
- 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
- 131
- 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
- Boustrophedon transform of 1 & primes: 1,2,3,5,7,...at n=7A000732
- Shifts left two terms under the binomial transform.at n=11A000995
- Expansion of 1/((1-x)^2*(1-x^2)*(1-x^5)*(1-x^10)*(1-x^20)).at n=44A001305
- Numbers that are the sum of 9 positive 6th powers.at n=43A003365
- Coordination sequence T2 for Zeolite Code AFR.at n=47A008020
- Doublets: base-10 representation is the juxtaposition of two identical strings.at n=37A020338
- Fibonacci sequence beginning 4, 14.at n=13A022383
- a(n) = n-th largest even number in array T given by A027170.at n=49A027183
- Positive numbers having the same set of digits in base 6 and base 9.at n=20A037436
- Sums of 10 distinct powers of 2.at n=37A038461
- Numbers whose base-4 representation contains no 1's and exactly four 3's.at n=35A045113
- Numbers whose base-4 representation contains exactly two 2's and four 3's.at n=8A045147
- Composite numbers whose 3 prime factors are distinct in length.at n=33A046443
- a(n) = T(3,n), array T given by A047858.at n=9A047860
- Coordination sequence T1 for Zeolite Code ISV.at n=43A047958
- Numbers whose consecutive digits differ by 5.at n=30A048407
- Positions in decimal expansion of Pi where next prime begins.at n=19A053013
- Number of bracelet structures using exactly three different colored beads.at n=11A056358
- a(0) = 1, a(1) = 5, a(2) = 13; a(n) = 2*a(n-1) + 2, n > 2.at n=10A060182
- Numbers n such that phi(2n-1) = sigma(n).at n=23A067230