3430
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 10
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 7200
- Proper Divisor Sum (Aliquot Sum)
- 3770
- 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
- 1176
- Möbius Function
- 0
- Radical
- 70
- Omega Function (Ω)
- 5
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 30
- 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
- Number of 2n-bead black-white strings with n black beads and fundamental period 2n.at n=7A007727
- Irregular triangle read by rows: Whitney numbers of the second kind a(n,k), n >= 1, k >= 0, for the star poset.at n=42A007799
- Coordination sequence T2 for Zeolite Code ATT.at n=42A008042
- Triangle of coefficients in expansion of (1+7x)^n.at n=18A013614
- Numbers k such that the continued fraction for sqrt(k) has period 42.at n=35A020381
- Base 6 expansion uses each positive digit just once.at n=34A023744
- n written in fractional base 5/3.at n=30A024633
- Numbers of form 7^i*10^j, with i, j >= 0.at n=11A025632
- Triangle whose (i,j)-th entry is binomial(i,j)*7^(i-j).at n=17A027466
- a(n) = 7^(n-2) * C(n,2).at n=3A027474
- Clog sequence in base 2. Right to left concatenation of n,int(log_2(n)),int(log_2(int(log_2(n)))),... in base 2.at n=37A028423
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 24 ones.at n=37A031792
- Number of partitions of n with equal number of parts congruent to each of 3 and 4 (mod 5).at n=35A035561
- a(n) = ceiling((n^3)/2).at n=19A036486
- Duplicate of A027466.at n=17A038267
- Coordination sequence T3 for Zeolite Code ESV.at n=39A038412
- Coordination sequence T7 for Zeolite Code STT.at n=39A038419
- Numbers whose base-7 representation contains exactly three 0's.at n=26A043395
- Numbers n such that string 3,0 occurs in the base 10 representation of n but not of n-1.at n=38A044362
- Numbers n such that string 4,3 occurs in the base 10 representation of n but not of n-1.at n=37A044375