3622
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 5436
- Proper Divisor Sum (Aliquot Sum)
- 1814
- 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
- 1810
- Möbius Function
- 1
- Radical
- 3622
- 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
- 69
- Smith Number
- yes
- 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
- No-3-in-line problem on n X n grid: total number of ways of placing 2n points on n X n grid so no 3 are in a line. No symmetries are taken into account.at n=12A000755
- Coordination sequence T2 for Zeolite Code MTW.at n=39A008197
- Coordination sequence T6 for Zeolite Code PAU.at n=44A008224
- Coordination sequence T7 for Zeolite Code VNI.at n=37A009913
- Numbers k such that the continued fraction for sqrt(k) has period 46.at n=24A020385
- Number of 3's in n-th term of A022470.at n=34A022474
- Sequence satisfies T(a)=a, where T is defined below.at n=44A027592
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 60.at n=2A031558
- Numbers k such that s(k) + s(k+1) + ... + s(k+7) = t(k) + t(k+1) + ... + t(k+7).at n=6A033914
- Number of partitions of n such that cn(1,5) <= cn(0,5) = cn(2,5) < cn(3,5) = cn(4,5).at n=74A036852
- Digit sum of 'even' number equals digit sum of 'sum' and 'juxtaposition' of its prime factors (counted with multiplicity).at n=37A036926
- Coordination sequence T1 for Zeolite Code ESV.at n=40A038409
- Denominators of continued fraction convergents to sqrt(682).at n=7A042311
- Numbers n such that string 2,2 occurs in the base 10 representation of n but not of n-1.at n=36A044354
- Numbers n such that string 2,2 occurs in the base 10 representation of n but not of n+1.at n=36A044735
- a(n) = Sum_{i=0..n} A047080(i,n-i).at n=20A047084
- Table T(n,k) by antidiagonals: T(n,k) = number of partitions of n balls of k colors.at n=41A075196
- G.f. is 1/F, where x*F is g.f. for Fibonacci word (A003849).at n=64A080845
- Numbers n such that the least positive primitive root of n is larger than the value for all positive numbers smaller than n.at n=11A081888
- Indices n of primes p(n), p(n+4) such that p(n)-1 and p(n+4)-1 have the same largest prime factor.at n=16A105407