3448
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 5
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 6480
- Proper Divisor Sum (Aliquot Sum)
- 3032
- 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
- 1720
- Möbius Function
- 0
- Radical
- 862
- Omega Function (Ω)
- 4
- 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
- 43
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- 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
- Coordination sequence T1 for Zeolite Code AFS.at n=45A008023
- Coordination sequence T2 for Zeolite Code YUG.at n=38A008248
- Partial sums of primes, if 1 is regarded as a prime (as it was until quite recently, see A008578).at n=42A014284
- Numbers k such that phi(k) + 9 | sigma(k + 9).at n=34A015788
- Numbers k such that the continued fraction for sqrt(k) has period 48.at n=26A020387
- a(n) = n*(27*n - 1)/2.at n=16A022284
- a(n) = s(n+3)/3, where s is A024947.at n=12A024948
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 24 ones.at n=38A031792
- a(n) = floor(10^5/n).at n=28A033427
- Number of partitions of n into parts not of the form 19k, 19k+9 or 19k-9. Also number of partitions with at most 8 parts of size 1 and differences between parts at distance 8 are greater than 1.at n=29A035978
- Numbers k such that k-th and (k+1)-st term of A038593 differ by 6.at n=24A038637
- Number of partitions satisfying cn(0,5) + cn(1,5) + cn(4,5) < cn(2,5) + cn(3,5).at n=33A039880
- Numbers n such that string 4,8 occurs in the base 10 representation of n but not of n-1.at n=37A044380
- Numbers n such that string 4,8 occurs in the base 10 representation of n but not of n+1.at n=37A044761
- Numbers with multiplicative persistence value 5.at n=42A046514
- Numbers k such that k^6 == 1 (mod 7^4).at n=7A056092
- Composite n such that phi(n+4) = phi(n)+4.at n=29A056773
- Coefficients of replicable function number "32b".at n=29A058632
- Dimension of the space of weight n cuspidal newforms for Gamma_1( 91 ).at n=11A063364
- Start with x, xy; then concatenate each word in turn with all preceding words, getting x xy xxy xxxy xyxxy xxxxy xyxxxy xxyxxxy ...; sequence gives number of words of length n. Also binary trees by degree: x (x,y) (x,(x,y)) (x,(x,(x,y))) ((x,y),(x,(x,y)))...at n=15A063895