2764
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
- 6
- Divisor Sum
- 4844
- Proper Divisor Sum (Aliquot Sum)
- 2080
- 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
- 1380
- Möbius Function
- 0
- Radical
- 1382
- Omega Function (Ω)
- 3
- 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
- 128
- 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
- Construct a triangle as in A036262. Sequence is one less than the position of the first number larger than 2 in the n-th row (n-th difference).at n=45A000232
- Number of n-step self-avoiding walks on f.c.c. lattice ending at point with x = 0.at n=4A000765
- Coordination sequence T4 for Zeolite Code GOO.at n=36A008114
- Coordination sequence T1 for Zeolite Code MEP.at n=31A008157
- Index of central binomial coefficient C(2n,n) within A006987.at n=10A009561
- Coordination sequence for MgCu2, Mg position.at n=13A009931
- Numbers k such that the continued fraction for sqrt(k) has period 80.at n=3A020419
- Positive integers which apparently never result in a palindrome under repeated applications of the function A056964(x) = x + (x with digits reversed).at n=32A023108
- Numbers k such that Fibonacci(k) == 3 (mod k).at n=33A023175
- Number of sums S of distinct positive integers satisfying S <= n.at n=31A026906
- Numbers k such that k^2+k+7 is a palindrome.at n=10A027722
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 26.at n=26A031524
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 34 ones.at n=7A031802
- Numbers k such that 127*2^k+1 is prime.at n=14A032413
- Numbers in which all pairs of consecutive base-5 digits differ by 2.at n=30A033083
- Number of partitions in parts not of the form 17k, 17k+1 or 17k-1. Also number of partitions with no part of size 1 and differences between parts at distance 7 are greater than 1.at n=35A035962
- Position of first term > 2 in n-th row of Gilbreath array shown in A036262.at n=50A036277
- Position of first term > 2 in n-th row of Gilbreath array shown in A036262.at n=49A036277
- Position of first term > 2 in n-th row of Gilbreath array shown in A036262.at n=48A036277
- Position of first term > 2 in n-th row of Gilbreath array shown in A036262.at n=47A036277