4826
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 5
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 7680
- Proper Divisor Sum (Aliquot Sum)
- 2854
- 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
- 2268
- Möbius Function
- -1
- Radical
- 4826
- 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
- 72
- 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
- Smallest nonnegative number that is the sum of 3 squares in exactly n ways.at n=29A000437
- Smallest number that is the sum of 3 squares in at least n ways.at n=29A000451
- Numbers that are the sum of 3 nonzero 6th powers.at n=13A003359
- Numbers that are the sum of at most 3 nonzero 6th powers.at n=27A004854
- Numbers that are the sum of at most 4 nonzero 6th powers.at n=46A004855
- Coordination sequence T5 for Zeolite Code EUO.at n=43A008100
- a(n) = s(1)*s(n) + s(2)*s(n-1) + ... + s(k)*s(n-k+1), where k = [n/2], s = (Lucas numbers).at n=12A025089
- a(n) is the smallest number that is the sum of 3 nonzero squares in exactly n ways.at n=29A025414
- Least sum of 3 distinct nonzero squares in exactly n ways.at n=29A025415
- Denominators of continued fraction convergents to sqrt(489).at n=10A041933
- Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 24.at n=30A051989
- Numbers k such that 30*R_k + 7 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=11A056680
- Row sums of triangle A064094.at n=8A064095
- Numbers k such that Euler phi(k) / Carmichael lambda(k) = 18.at n=24A066697
- Convolution of L(n+1) := A000204(n+1) (Lucas), n>=0, with L(n+8), n>=0.at n=5A067986
- Squared radii of the spheres around (0,0,0) that contain record numbers of lattice points.at n=39A071609
- a(n) = 1^n + 3^n + 4^n.at n=6A074506
- Numbers m = d_1 d_2 ... d_k (in base 10) with properties that k is even and d_i + d_{k+1-i} = 10 for all i.at n=43A083678
- Number of primes less than 10^n having at least one digit 9.at n=4A091710
- Sum of smallest parts of all partitions of n into distinct parts.at n=44A092265