1138
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 1710
- Proper Divisor Sum (Aliquot Sum)
- 572
- 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
- 568
- Möbius Function
- 1
- Radical
- 1138
- Omega Function (Ω)
- 2
- 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
- 57
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- Squarefree Number
- yes
- 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
- Expansion of 1/((1-x)^2*(1-x^2)*(1-x^5)*(1-x^10)*(1-x^20)).at n=31A001305
- Expansion of q^(-1/4) * (eta(q^4) / eta(q))^2 in powers of q.at n=13A001936
- Numbers k such that (k^2 + k + 1)/21 is prime.at n=50A002644
- Numbers that are the sum of 4 nonzero 4th powers.at n=50A003338
- Coordination sequence T4 for Zeolite Code EUO.at n=21A008099
- Coordination sequence T7 for Zeolite Code MTT.at n=21A008195
- Coordination sequence T5 for Zeolite Code -CLO.at n=30A009854
- Coordination sequence T6 for Zeolite Code CON.at n=24A009873
- Coordination sequence T2 for Zeolite Code RTE.at n=23A009891
- Coordination sequence T3 for Zeolite Code RTE.at n=23A009892
- Second coordinate of fundamental unit of real quadratic field with discriminant A003658(n), n >= 2.at n=29A014046
- Numbers k such that phi(k) + 4 | sigma(k + 4).at n=43A015783
- Numbers n such that phi(n) + 8 | sigma(n + 8), where phi = A000010 and sigma = A000203.at n=42A015787
- Numbers k such that phi(k + 4) | sigma(k) for k not congruent to 0 (mod 3).at n=48A015847
- Powers of cube root of 14 rounded down.at n=8A018015
- Magic numbers: atoms with full shells containing any of these numbers of electrons are considered electronically stable.at n=16A018227
- Numbers k such that the continued fraction for sqrt(k) has period 13.at n=9A020352
- Number of partitions of n into 6 unordered relatively prime parts.at n=30A023026
- Convolution of A023531 and (1, p(1), p(2), ...).at n=52A023559
- Convolution of A023531 and primes.at n=51A023567