4450
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
- 12
- Divisor Sum
- 8370
- Proper Divisor Sum (Aliquot Sum)
- 3920
- 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
- 1760
- Möbius Function
- 0
- Radical
- 890
- Omega Function (Ω)
- 4
- 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
- 139
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- 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
- Coordination sequence T2 for Zeolite Code AEL.at n=44A008005
- Coordination sequence T3 for Zeolite Code DOH.at n=41A008080
- Coordination sequence T1 for Zeolite Code MON.at n=41A008181
- Coordination sequence T3 for Zeolite Code MOR.at n=43A008184
- Numbers k such that sigma(k) = sigma(k+6).at n=19A015866
- Expansion of 1/((1-3*x)*(1-9*x)*(1-10*x)).at n=3A018090
- Expansion of 1/((1-x)*(1-5*x)*(1-8*x)*(1-9*x)).at n=3A022469
- Number of 3's in n-th term of A006711.at n=35A022479
- Coordination sequence T1 for Zeolite Code MWW.at n=44A024986
- Numbers that are the sum of 2 nonzero squares in exactly 3 ways.at n=44A025286
- a(n) = 2*n^2 + 9*n - 5.at n=44A056237
- Numbers n such that n | 7^n + 6^n + 5^n + 4^n + 3^n + 2^n + 1^n.at n=31A056750
- Integer part of log(n)^sqrt(n).at n=40A062463
- Last digit of n, phi(n) and sigma(n) is 0 in base 10.at n=33A072604
- Numbers k such that the number of primes between k and 2k (inclusive) is equal to the number of primes between k and reverse(k) (inclusive).at n=18A074814
- Numbers n such that h(n) = 2 h(n-1) where h(n) is the length of the sequence {n, f(n), f(f(n)), ...., 1} in the Collatz (or 3x + 1) problem. (The earliest "1" is meant.)at n=17A078419
- A hexagonal spiral Fibonacci sequence.at n=17A094925
- Numbers k such that k!! - prime(k) is prime.at n=9A108420
- Least positive k such that k * Y^n + 1 is prime, where Y = 2^100+277, the first prime greater than a "little googol.".at n=25A108665
- Numbers n such that n^4+1 and n^4+3 are twin primes.at n=36A127871