2290
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
- 4140
- Proper Divisor Sum (Aliquot Sum)
- 1850
- 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
- 912
- Möbius Function
- -1
- Radical
- 2290
- 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
- 151
- 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
- MacMahon's generalized sum of divisors function.at n=24A002127
- Symmetries in planted (1,3) trees on 2n vertices.at n=9A003609
- a(n) = Sum_{k=0..n} C(n-k,4*k).at n=15A005676
- Number of 3-covers of an unlabeled n-set.at n=11A005783
- Coordination sequence T7 for Zeolite Code PAU.at n=35A008225
- Molien series of 4-dimensional representation of cyclic group of order 4 over GF(2) (not Cohen-Macaulay).at n=36A008610
- Coordination sequence T4 for Zeolite Code VET.at n=29A009905
- Composite numbers that are equal to the sum of the first k composites for some k.at n=42A013921
- Iccanobif numbers: add reversal of a(n-1) to a(n-2).at n=17A014259
- Expansion of 1/((1-x)(1-7x)(1-9x)).at n=3A016250
- a(n) = a(n-4) + a(n-5), with a(0)=1, a(1)=a(2)=a(3)=0, a(4)=1.at n=60A017827
- Numbers k such that the continued fraction for sqrt(k) has period 15.at n=13A020354
- Numbers k such that Fibonacci(k) == 55 (mod k).at n=34A023181
- Sum of remainders of n mod prime(k), for k = 1,2,3,...,n.at n=54A024925
- dot_product(n,n-1,...2,1)*(6,7,...,n,1,2,3,4,5).at n=14A026063
- Diagonal sum of left justified array T given by A027082.at n=21A027100
- McKay-Thompson series of class 16B for the Monster group.at n=57A029839
- Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted then there are a pair of central terms both equal to 10.at n=4A031423
- Numbers k such that 69*2^k+1 is prime.at n=13A032384
- Base-4 palindromes that start with 2.at n=29A043004