2998
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 28
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 4500
- Proper Divisor Sum (Aliquot Sum)
- 1502
- 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
- 1498
- Möbius Function
- 1
- Radical
- 2998
- Omega Function (Ω)
- 2
- Little Omega Function (ω)
- 2
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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 48
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- 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 bipartite partitions of n white objects and 7 black ones.at n=7A002756
- Number of bipartite partitions of n white objects and n black ones.at n=7A002774
- Number of unlabeled bisectable trees with 2n+1 nodes.at n=9A007098
- Coordination sequence T1 for Zeolite Code CAS.at n=34A008063
- Coordination sequence T3 for Zeolite Code NES.at n=35A008207
- Seven iterations of Reverse and Add are needed to reach a palindrome.at n=41A015986
- Coordination sequence T1 for Zeolite Code TER.at n=37A016433
- Numbers k such that the continued fraction for sqrt(k) has period 54.at n=7A020393
- a(n) = least m such that if r and s in {1/1, 1/2, 1/3, ..., 1/n} satisfy r < s, then r < k/m < (k+3)/m < s for some integer k.at n=28A024843
- Numbers k such that k*(k+3) is a palindrome.at n=10A028553
- Numbers having period-6 5-digitized sequences.at n=24A031190
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 54.at n=8A031552
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 22 ones.at n=39A031790
- Write 1,2,... in a clockwise spiral; sequence gives numbers on positive x axis.at n=27A033951
- Numbers k such that the decimal part of k^(1/7) starts with a 'nine digits' anagram.at n=2A034282
- Numbers having three 6's in base 8.at n=5A043447
- Numbers n such that string 9,8 occurs in the base 10 representation of n but not of n-1.at n=32A044430
- Numbers n such that string 9,8 occurs in the base 10 representation of n but not of n+1.at n=32A044811
- Numbers whose base-3 representation contains exactly four 0's and four 1's.at n=26A044989
- Numbers whose base-5 representation contains exactly two 3's and three 4's.at n=6A045303