4046
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 7368
- Proper Divisor Sum (Aliquot Sum)
- 3322
- 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
- 1632
- Möbius Function
- 0
- Radical
- 238
- 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
- yes
- Harshad Number
- yes
- Narcissistic Number
- no
- Collatz Steps
- 157
- 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(n) = ceiling((1 + sum of preceding terms) / 2) starting with a(0) = 1.at n=21A005428
- 'Eban' numbers (the letter 'e' is banned!).at n=50A006933
- Coordination sequence T1 for Zeolite Code AFT.at n=48A008026
- Coordination sequence T2 for Zeolite Code APC.at n=44A008033
- Coordination sequence T3 for Zeolite Code THO.at n=45A008240
- Coordination sequence T1 for Zeolite Code AHT.at n=43A009866
- n written in fractional base 8/4.at n=46A024646
- 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 62.at n=14A031560
- Floor( 7*n^2/2 ).at n=34A032525
- Concatenation of n and n + 6 or {n,n+6}.at n=39A032611
- Number of binary rooted trees with n nodes and height at most 9.at n=14A036592
- Sum of first n lucky numbers.at n=41A046279
- Coordination sequence T1 for Zeolite Code DON.at n=43A047953
- a(n) = Sum_{i=0..n} T(i,n-i), array T as in A049639.at n=53A049640
- Partition numbers rounded to nearest integer given by the Hardy-Ramanujan approximate formula.at n=27A050811
- Multiples of 7 containing only even digits.at n=37A061826
- Dimension of the space of weight n cuspidal newforms for Gamma_1( 80 ).at n=41A063353
- a(n) = A064842(n)/2.at n=28A064843
- Reversion of g.f. (with constant term included) for partition numbers.at n=19A066398
- Numbers with no zeros in their cubes such that the products of the digits of their cubes are also cubes.at n=26A067071