4374
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 9840
- Proper Divisor Sum (Aliquot Sum)
- 5466
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 1458
- Möbius Function
- 0
- Radical
- 6
- Omega Function (Ω)
- 8
- 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
- no
- Harshad Number
- yes
- Narcissistic Number
- no
- Collatz Steps
- 77
- 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
- yes
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Appears in sequences
- a(n) is smallest number > a(n-1) of form a(i)*a(j), i < j < n.at n=38A000423
- Expansion of bracket function.at n=14A000748
- a(n) = max{(n - i)*a(i) : i < n}; a(0) = 1.at n=23A000792
- a(n) = smallest number m such that for all k > m, either k or k+1 has a prime factor > prime(n).at n=3A002072
- Numbers that are the sum of 6 positive 6th powers.at n=32A003362
- Numbers that are the sum of 2 positive 7th powers.at n=5A003369
- Numbers that are the sum of at most 2 positive 7th powers.at n=9A004864
- Numbers that are the sum of at most 3 positive 7th powers.at n=16A004865
- Numbers that are the sum of at most 4 positive 7th powers.at n=25A004866
- Numbers that are the sum of at most 5 positive 7th powers.at n=36A004867
- Numbers that are the sum of at most 6 positive 7th powers.at n=49A004868
- MU-numbers: next term is uniquely the product of 2 earlier terms.at n=21A007335
- Numbers k such that phi(k) divides k.at n=49A007694
- Losing initial configurations in 2-hole Tchuka Ruma.at n=19A007780
- Pisot sequences E(2,6), L(2,6), P(2,6), T(2,6).at n=7A008776
- a(n) = Product_{i=0..7} floor((n+i)/8).at n=23A009694
- Numbers k such that k divides 2^(k+1) - 2.at n=24A014741
- Numbers k such that k | (phi(k) * sigma(k)) but (phi(k) + sigma(k))/k does not increase.at n=35A015708
- Positive integers n such that n | (2^n + n/2 - 1).at n=22A015942
- Numbers n such that n divides n-th Lucas number A000032(n).at n=8A016089