2560
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
- 1
Divisibility
- Divisor Count
- 20
- Divisor Sum
- 6138
- Proper Divisor Sum (Aliquot Sum)
- 3578
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 1024
- Möbius Function
- 0
- Radical
- 10
- Omega Function (Ω)
- 10
- 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
- 14
- 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
- yes
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Appears in sequences
- Numbers that are the sum of 2 squares but not sum of 3 nonzero squares.at n=42A000549
- a(n+6) = -a(n+5) + a(n+4) + 3a(n+3) + a(n+2) - a(n+1) - a(n). a(n) = sign(n) if abs(n)<=3.at n=28A001945
- a(n) = 10*4^n.at n=4A002066
- Number of partitions of n into nonprime parts.at n=47A002095
- a(n) = n*2^(2*n-1).at n=5A002699
- Sum of 10 nonzero 8th powers.at n=10A003388
- Numbers that are the sum of 5 positive 9th powers.at n=5A003394
- Numbers of the form 2^i*5^j with i, j >= 0.at n=36A003592
- Numbers that are the sum of at most 5 positive 9th powers.at n=20A004889
- Numbers that are the sum of at most 6 positive 9th powers.at n=25A004890
- Numbers that are the sum of at most 7 positive 9th powers.at n=30A004891
- Numbers that are the sum of at most 8 positive 9th powers.at n=35A004892
- Numbers that are the sum of at most 9 positive 9th powers.at n=40A004893
- Theta series of P_{12a} packing.at n=3A005952
- Smallest k such that phi(x) = k has exactly n solutions, n>=2.at n=24A007374
- Smallest k such that k*n is a double factorial.at n=17A007919
- Coordination sequence T1 for Zeolite Code AST.at n=37A008036
- Coordination sequence T4 for Zeolite Code BRE.at n=33A008061
- Coordination sequence T1 for Zeolite Code MON.at n=31A008181
- Coordination sequence T2 for Zeolite Code -ROG.at n=38A009860