1378
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 2268
- Proper Divisor Sum (Aliquot Sum)
- 890
- 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
- 624
- Möbius Function
- -1
- Radical
- 1378
- 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
- yes
- 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
- 127
- 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
- Related to Zarankiewicz's problem.at n=50A001841
- Expansion of 1/((1-x)^4*(1+x)).at n=23A002623
- Number of solutions to a linear inequality.at n=33A002797
- Numbers which are the sum of 3 nonzero 4th powers.at n=36A003337
- Sums of distinct nonzero 4th powers.at n=36A003999
- Numbers k such that 4!*(2k-5)!/(k!*(k-1)!) is an integer.at n=10A004784
- Coefficients of period polynomials.at n=14A006308
- Number of factors in the infinite word formed by the Kolakoski sequence A000002.at n=41A007782
- Coordination sequence T2 for Zeolite Code AFT.at n=28A008027
- Coordination sequence T3 for Zeolite Code MEI.at n=27A008148
- Coordination sequence T1 for Zeolite Code NAT.at n=25A008203
- Coordination sequence T4 for Zeolite Code SGT.at n=23A008232
- Coordination sequence T1 for Zeolite Code YUG.at n=24A008247
- Expansion of 1/( Product_{j=0..5} (1-x^(2*j+1)) ).at n=53A008675
- a(n) = p*(p-1)/2 for p = prime(n).at n=15A008837
- a(n) is the concatenation of n and 6n.at n=12A009440
- Coordination sequence T5 for Zeolite Code -CLO.at n=33A009854
- Coordination sequence T2 for Zeolite Code -PAR.at n=26A009856
- Coordination sequence T2 for Zeolite Code -ROG.at n=28A009860
- Coefficients in expansion of Euler's constant gamma as Sum_{n>=1} a(n)/(n*n!*(n+1)!), as found by greedy algorithm.at n=43A009929