3148
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 5516
- Proper Divisor Sum (Aliquot Sum)
- 2368
- 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
- 1572
- Möbius Function
- 0
- Radical
- 1574
- Omega Function (Ω)
- 3
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 61
- 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
- a(0) = 1, a(n) = 26*n^2 + 2 for n>0.at n=11A010016
- Super-3 Numbers (3n^3 contains substring '333' in its decimal expansion).at n=25A014569
- Numbers k such that the continued fraction for sqrt(k) has period 36.at n=38A020375
- Convolution of natural numbers with Beatty sequence for the golden mean A000201.at n=21A023541
- Integer part of ((4th elementary symmetric function of 2,3,...,n+4)/(2nd elementary symmetric function of 2,3,...,n+4)).at n=16A024181
- a(n) = Sum_{k=0..2*n} (k+1)*T(n, 2*n-k), T given by A027960.at n=7A027982
- 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 28.at n=29A031526
- Coordination sequence T4 for Zeolite Code STT.at n=37A038417
- Numbers k such that k-th and (k+1)-st term of A038593 differ by 10.at n=43A038641
- Numerators of continued fraction convergents to sqrt(364).at n=5A041688
- Numbers k such that the string 7,7 occurs in the base 9 representation of k but not of k-1.at n=38A044321
- Numbers n such that string 4,8 occurs in the base 10 representation of n but not of n-1.at n=34A044380
- Numbers n such that string 7,7 occurs in the base 9 representation of n but not of n+1.at n=38A044702
- Numbers n such that string 4,8 occurs in the base 10 representation of n but not of n+1.at n=34A044761
- Numbers whose base-5 representation contains exactly three 0's and one 1.at n=32A045170
- Numbers whose base-5 representation contains exactly three 0's and one 3.at n=30A045200
- Numbers whose base-5 representation contains exactly three 0's and one 4.at n=30A045215
- T(n,n-3), array T given by A047000.at n=7A047005
- Numbers k such that 63*2^k-1 is prime.at n=28A050557
- a(n) = least value such that sequence increases and pairwise differences are unique.at n=42A058335