7304
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
- 16
- Divisor Sum
- 15120
- Proper Divisor Sum (Aliquot Sum)
- 7816
- 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
- 3280
- Möbius Function
- 0
- Radical
- 1826
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 132
- 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) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (1, p(1), p(2), ...), t = (composite numbers).at n=27A025100
- Numbers k such that 73*2^k+1 is prime.at n=19A032386
- a(n) = prime(n)*prime(n+1) - prime(n).at n=22A037166
- Base-7 palindromes that start with 3.at n=18A043017
- Number of rooted trees with n nodes with every leaf at the same height.at n=20A048816
- Number of multigraphs with loops on 3 nodes with n edges.at n=19A050531
- (Terms in A014450)/2.at n=10A051474
- (Terms in A014450)/2.at n=14A051474
- (Terms in A014472)/2.at n=4A051475
- Integers that are Rhonda numbers to base 6.at n=5A100969
- Positive integers n such that n^14 + 1 is semiprime (A001358).at n=34A104335
- Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n that have k valleys at level 1.at n=50A114489
- Number of 6-tuples of primes in arithmetic progression less than 10^n.at n=4A115611
- Row sums of pendular triangle A122445.at n=8A122452
- Concatenation of first two digits and last two digits of n-th even superperfect number A061652(n).at n=15A138869
- Numbers k such that A120292(k) is composite.at n=39A141779
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 1), (0, -1, 1), (0, 1, -1), (1, 0, 0)}.at n=10A148099
- Symmetrical triangle T(n, m) = floor(Eulerian(n+1, m)/2), read by rows.at n=22A174098
- Symmetrical triangle T(n, m) = floor(Eulerian(n+1, m)/2), read by rows.at n=26A174098
- a(n) = (9*n+2)*(9*n+7).at n=9A177072