3140
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 8
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 6636
- Proper Divisor Sum (Aliquot Sum)
- 3496
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 1248
- Möbius Function
- 0
- Radical
- 1570
- Omega Function (Ω)
- 4
- 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
- 123
- 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
- Absolute value of Glaisher's alpha(n).at n=33A002290
- Squares written in base 9.at n=47A002442
- Numbers k such that k^64 + 1 is prime.at n=32A006316
- Coordination sequence T3 for Zeolite Code LOV.at n=37A008136
- Coordination sequence T1 for Zeolite Code MER.at n=41A008160
- Coordination sequence T2 for Zeolite Code NON.at n=34A008213
- Aliquot sequence starting at 180.at n=35A008891
- a(n) = floor( n*(n-1)*(n-2)/29 ).at n=46A011911
- Number of lines through exactly 7 points of an n X n grid of points.at n=45A018814
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite YUG = Yugawaralite Ca2[Al4Si12O32].8H2O starting from a T2 atom.at n=11A019265
- a(n) = (d(n)-r(n))/5, where d = A026057 and r is the periodic sequence with fundamental period (1,0,3,1,0).at n=38A026059
- a(n) = Sum_{k=m..n} T(k,n-k), where m = floor((n+1)/2); a(n) is the n-th diagonal-sum of left justified array T given by A027948.at n=20A027959
- 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 28.at n=28A031526
- Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 28.at n=3A031706
- Concatenation of n and n + 9 or {n,n+9}.at n=30A032614
- Numerators of continued fraction convergents to sqrt(390).at n=5A041740
- Numbers having four 0's in base 5.at n=10A043352
- Numbers k such that the string 6,8 occurs in the base 9 representation of k but not of k-1.at n=42A044313
- Numbers n such that string 1,4 occurs in the base 10 representation of n but not of n-1.at n=35A044346
- Numbers n such that string 4,0 occurs in the base 10 representation of n but not of n-1.at n=34A044372