2428
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
- 3
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 4256
- Proper Divisor Sum (Aliquot Sum)
- 1828
- 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
- 1212
- Möbius Function
- 0
- Radical
- 1214
- 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
- 45
- 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
- 5th forward differences of factorial numbers A000142.at n=2A001689
- Shifts left when inverse Moebius transform applied twice.at n=30A007557
- Coordination sequence T1 for Zeolite Code LOV.at n=33A008134
- Coordination sequence T8 for Zeolite Code MFS.at n=31A008180
- Coordination sequence T3 for Zeolite Code -ROG.at n=37A009861
- a(n) = floor( n*(n-1)*(n-2)/5 ).at n=24A011887
- Partial sums of primes, if 1 is regarded as a prime (as it was until quite recently, see A008578).at n=36A014284
- Numbers k such that the continued fraction for sqrt(k) has period 40.at n=10A020379
- Numbers having period-6 5-digitized sequences.at n=18A031190
- 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 24.at n=28A031522
- Concatenation of n and n + 4 or {n,n+4}.at n=23A032609
- Least number of Sort-then-add persistence n.at n=19A033863
- Least number of Sort-then-add persistence n.at n=19A033908
- a(n)=number of Gaussian integers z=a+bi satisfying |z|<=n, b>=0.at n=39A036695
- Number of partitions satisfying (cn(0,5) = 0 and cn(2,5) = cn(3,5)).at n=40A036815
- Coordination sequence T10 for Zeolite Code STT.at n=33A038422
- Denominators of continued fraction convergents to sqrt(846).at n=12A042633
- Numbers n such that string 7,4 occurs in the base 8 representation of n but not of n-1.at n=41A044247
- Numbers n such that string 8,7 occurs in the base 9 representation of n but not of n-1.at n=32A044330
- Numbers n such that string 2,8 occurs in the base 10 representation of n but not of n-1.at n=27A044360