4890
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 21
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 11808
- Proper Divisor Sum (Aliquot Sum)
- 6918
- 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
- 1296
- Möbius Function
- 1
- Radical
- 4890
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 4
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
- 41
- 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
- Sum of 6th powers: 0^6 + 1^6 + 2^6 + ... + n^6.at n=4A000540
- a(n) = 1^n + 2^n + 3^n + 4^n.at n=6A001551
- Numbers that are the sum of 4 positive 6th powers.at n=20A003360
- Numbers that are the sum of 10 positive 7th powers.at n=25A003377
- Numbers that are the sum of at most 4 nonzero 6th powers.at n=49A004855
- Coordination sequence for Cr3Si, Cr position.at n=18A009928
- Base-5 Armstrong or narcissistic numbers (written in base 10).at n=11A010346
- "DFK" (bracelet, size, unlabeled) transform of 2,1,1,1...at n=29A032215
- Smallest number > 1 equal to sum of n-th powers of its base-5 digits, or 0 if no such number exists (written in base 10).at n=5A033837
- Multiplicity of highest weight (or singular) vectors associated with character chi_36 of Monster module.at n=36A034424
- Number of non-isomorphic arrangements of n lines in the real projective plane such that the lines do not all pass through a common point.at n=5A048872
- Number of nonisomorphic oriented matroids with n points in 2 dimensions.at n=5A063800
- Triangle T(n,k) (n >= 3, k = 1..n-2) read by rows, giving number of nonisomorphic oriented matroids with n points in n-k dimensions.at n=20A063804
- a(n) = Sum_{m=1..n} Sum_{i=1..m} F(i)*F(i+1) where F(n)=Fibonacci numbers A000045.at n=9A080145
- Sum of terms in n-th row of modified Pascal's triangle displayed in A082905.at n=14A082906
- 1 + 4^n + 9^n + 16^n.at n=2A091775
- Square array T(m,n) read by antidiagonals: Sum_{k=1..n} k^m.at n=59A103438
- A126988^12 * A000594.at n=4A128392
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (0, 0, 1), (0, 1, 1), (1, 1, -1), (1, 1, 0)}.at n=6A151185
- a(n) = 49*n^2 - n.at n=9A157923