2990
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
- 1
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 6048
- Proper Divisor Sum (Aliquot Sum)
- 3058
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- yes
Derived Values
- Euler's Totient
- 1056
- Möbius Function
- 1
- Radical
- 2990
- 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
- 48
- 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
- Primitive pseudoperfect numbers.at n=43A006036
- Primitive nondeficient numbers.at n=34A006039
- Shifts left under XOR-convolution with itself.at n=9A007462
- Molien series for cyclic group of order 5.at n=22A008646
- Coordination sequence T1 for Zeolite Code RUT.at n=36A009897
- Coordination sequence for sigma-CrFe, Position Xf.at n=14A009958
- a(n) = floor(C(n,4)/5).at n=26A011795
- Smallest positive number that can be written as sum of distinct Fibonacci numbers in n ways.at n=45A013583
- Numbers k such that sigma(k) = sigma(k+6).at n=16A015866
- Numbers whose base-2 representation is the juxtaposition of two identical strings.at n=45A020330
- Numbers whose base-4 representation is the juxtaposition of two identical strings.at n=45A020332
- Numbers whose base-8 representation is the juxtaposition of two identical strings.at n=45A020336
- a(n) = n*(15*n - 1)/2.at n=20A022272
- Number of partitions of n into parts of 5 kinds.at n=7A023004
- a(n) = n*(n^2 + 12*n - 25)/6.at n=23A026057
- Number of partitions of n that do not contain 5 as a part.at n=29A027339
- Number of ways to partition n elements into pie slices of different sizes.at n=27A032153
- "DFK" (bracelet, size, unlabeled) transform of 2,2,2,2...at n=19A032214
- Positive numbers k such that (k+1)*(k+2)*(k+3)*(k+4)/(k+(k+1)+(k+2)+(k+3)+(k+4)) is an integer.at n=13A032795
- Coordination sequence T2 for Zeolite Code SBE.at n=44A033605