1394
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 2268
- Proper Divisor Sum (Aliquot Sum)
- 874
- 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
- 640
- Möbius Function
- -1
- Radical
- 1394
- 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
- yes
- 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
- sigma_4(n): sum of 4th powers of divisors of n.at n=5A001159
- Number of partitions of floor(5n/2) into n nonnegative integers each no more than 5.at n=20A001975
- Numbers of the form (p^2 - 1)/120 where p is 1 or prime.at n=36A002381
- Sums of distinct nonzero 4th powers.at n=38A003999
- a(n) = round(n*phi^7), where phi is the golden ratio, A001622.at n=48A004942
- a(n) = ceiling(n*phi^7), where phi is the golden ratio, A001622.at n=48A004962
- a(n) = ceiling(n*phi^11), where phi is the golden ratio, A001622.at n=7A004966
- Sequence and first differences (A030124) together list all positive numbers exactly once.at n=47A005228
- a(n) is the number of compositions of n in which the maximum part size is 5.at n=14A006979
- 7th-order maximal independent sets in cycle graph.at n=47A007389
- Dodecahedral surface numbers: a(0)=0, a(1)=1, a(2)=20, thereafter 2*((3*n-7)^2 + 21).at n=11A007589
- Noncubes such that some permutation of digits is a cube.at n=47A007940
- Coordination sequence T3 for Zeolite Code LTN.at n=26A008142
- Integers that are squarefree and also the sum of first k squarefrees for some k.at n=23A013932
- Seven iterations of Reverse and Add are needed to reach a palindrome.at n=18A015986
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite NON = Nonasil-[ 4158 ] [Si88O176].4R starting with a T5 atom.at n=10A019211
- Numbers whose base-9 representation is the juxtaposition of two identical strings.at n=16A020337
- a(n) = a(n-1) + c(n+1) for n >= 3, a( ) increasing, given a(1)=1, a(2)=7; where c( ) is complement of a( ).at n=46A022953
- Numbers that are the sum of 3 distinct nonzero squares in exactly 10 ways.at n=28A025348
- Numbers that are the sum of 3 distinct nonzero squares in 10 or more ways.at n=41A025356