7632
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 30
- Divisor Sum
- 21762
- Proper Divisor Sum (Aliquot Sum)
- 14130
- 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
- 2496
- Möbius Function
- 0
- Radical
- 318
- Omega Function (Ω)
- 7
- 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
- 39
- 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
- Convolution of natural numbers >= 2 and natural numbers >= 3.at n=31A023545
- Iterated procedure 'composite k added to sum of its prime factors reaches a prime' yields 8 skipped primes.at n=42A050775
- a(n) = |{m : multiplicative order of 6 mod m=n}|.at n=47A059888
- Numbers k such that sigma(x) = k has exactly 7 solutions.at n=29A060663
- Row sums in A083175.at n=15A083175
- Expansion of 1/sqrt(1-4*x-36*x^2).at n=5A098455
- Numbers k such that the sum of the first k primes is prime and the sum of the squares of the first k primes is also prime.at n=34A124225
- Numbers with 30 divisors.at n=34A137493
- Number of triples (p,q,r) of primes with p<q<r<=prime(n), p+q>r, q+r>p and r+p>q.at n=50A138226
- First differences of perfect numbers A000396.at n=2A139228
- Twice octagonal numbers: 2*n*(3*n-2).at n=36A139267
- Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0), ending on the vertical axis and consisting of n steps taken from {(-1, 0), (-1, 1), (0, -1), (1, 0), (1, 1)}.at n=8A151450
- Row 4 of table A162424.at n=19A162427
- a(n) = 3*n*(5*n-1)/2.at n=31A167469
- a(n) = 6*a(n-1) - 8*a(n-2), for n > 2, with a(0) = 1, a(1) = 6, a(2) = 27.at n=6A171475
- a(n) = Sum_{d|n} d*sigma(n/d)*sigma(d).at n=43A174468
- Period of the decimal representation of 1/Fibonacci(n).at n=33A175561
- Products of form p^4*q^2*r where p, q and r are three distinct primes.at n=31A179669
- a(n) = Carmichael(F(n)), where F(n) are the Fibonacci numbers.at n=35A181091
- Number of strings of numbers x(i=1..5) in 0..n with sum i^2*x(i)^2 equal to n^2*25.at n=52A184243