1778
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 3072
- Proper Divisor Sum (Aliquot Sum)
- 1294
- 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
- 756
- Möbius Function
- -1
- Radical
- 1778
- Omega Function (Ω)
- 3
- 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
- 148
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
- Number of nonnegative solutions to x^2 + y^2 <= n^2.at n=47A000603
- a(n+1) = 1 + a( floor(n/1) ) + a( floor(n/2) ) + ... + a( floor(n/n) ).at n=25A003318
- Numbers that are the sum of 7 positive 6th powers.at n=20A003363
- Numbers not of form p + 2^x + 2^y.at n=39A006286
- Shifts 2 places left when convolved with itself.at n=13A007477
- Numbers k such that phi(k) + 12 | sigma(k).at n=44A015805
- Powers of fourth root of 10 rounded down.at n=13A018072
- Powers of fourth root of 10 rounded to nearest integer.at n=13A018073
- Number of partitions of n into an even number of parts, the least being 6; also, a(n+6) = number of partitions of n into an odd number of parts, each >=6.at n=69A027198
- Positions of record values in A030747.at n=39A030752
- Least term in period of continued fraction for sqrt(n) is 6.at n=15A031430
- Numbers whose set of base-6 digits is {1,2}.at n=41A032927
- Coordination sequence T4 for Zeolite Code CFI.at n=28A033602
- Number of partitions of n with equal number of parts congruent to each of 1 and 4 (mod 5).at n=36A035558
- Number of partitions satisfying (cn(2,5) = cn(3,5) and cn(0,5) <= cn(1,5) and cn(0,5) <= cn(4,5)).at n=35A036805
- Coordination sequence T2 for Zeolite Code STT.at n=28A038423
- Coordination sequence T4 for Zeolite Code SFF.at n=28A038434
- Coefficients arising in the enumeration of configurations of linear chains.at n=9A038747
- Numbers whose base-12 representation has the same nonzero number of 0's and 4's.at n=45A039496
- Numerators of continued fraction convergents to sqrt(562).at n=5A042076