2830
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
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 5112
- 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
- 1128
- Möbius Function
- -1
- Radical
- 2830
- 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
- 35
- 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
- Number of irreducible chord diagrams with 2n nodes.at n=6A000699
- Numbers that are the sum of 9 positive 7th powers.at n=15A003376
- Expansion of 1/((1-2x)(1+x^2)(1-x-2x^3)).at n=10A003477
- Number of Twopins positions.at n=17A005687
- Coordination sequence T2 for Milarite.at n=33A008257
- Coordination sequence for FeS2-Marcasite, S position.at n=26A009954
- Coordination sequence T2 for Zeolite Code OSI.at n=35A016431
- Coordination sequence T5 for Zeolite Code TER.at n=36A016437
- Expansion of 1/((1-3x)*(1-7x)*(1-9x)).at n=3A017998
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite STI = Stilbite Na4Ca8[Al20Si52O144].56H2O starting with a T4 atom.at n=11A019239
- Numbers k such that the continued fraction for sqrt(k) has period 50.at n=8A020389
- Numbers k such that Fibonacci(k) == -55 (mod k).at n=45A023170
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 24 ones.at n=23A031792
- Concatenation of n and n + 2 or {n,n+2}.at n=27A032607
- Increasing gaps among twin primes: size.at n=24A036063
- Number of partitions satisfying (cn(0,5) <= cn(1,5) = cn(4,5)).at n=40A036809
- Differences of A038011.at n=7A038012
- Base-4 palindromes that start with 2.at n=38A043004
- Numbers n such that string 8,4 occurs in the base 9 representation of n but not of n-1.at n=37A044327
- Numbers n such that string 3,0 occurs in the base 10 representation of n but not of n-1.at n=31A044362