Properties of the Number 2866

Two Thousand Eight Hundred Sixty-Six

Basics

Value: 2865 → 2866 → 2867

Parity: even

Prime: No

Previous Prime: 2861

Next Prime: 2879

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 1433

Divisors: 1, 2, 1433, 2866

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101100110010

Octal: 5462

Duodecimal: 17AA

Hexadecimal: b32

Square: 8213956

Square Root: 53.53503525729669

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

The number of n-full sets, F(n). A188431

Numbers n such that BCR(n) = n, where BCR = binary-complement-and-reverse = take one's complement then reverse bit order. A35928

Positive integers k such that k²⁰ + 1 is semiprime (A001358). A105282

T(n,k)=Number of (n+3)X(k+3) binary arrays with every 4X4 subblock commuting with each horizontal and vertical neighbor 4X4 subblock. A188105

Total length of longest runs of 1's in all bitstrings of length n. A119706

T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with the difference of the upper and lower median value of each 2X2 subblock in lexicographically nondecreasing order rowwise and columnwise. A235573

The smallest number whose prime factor concatenation, when written in base n, contains all digits 0,1,...,(n-1). A372309

Composite numbers that are equal to the sum of the first k composites for some k. A13921

Number of (unordered) triples of integers from [1,n] with no common factors between pairs. A15617

Number of different values of i² + j² + k² for i,j,k in [ 0,n ] (or [ -n,n ]). A34966