Properties of the Number -2868

Eight Hundred Sixty-Eight

Basics

Value: -2869 → -2868 → -2867

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 ² × 3 × 239

Divisors: 1, 2, 3, 4, 6, 12, 239, 478, 717, 956

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101100110100

Octal: -5464

Duodecimal: -17B0

Hexadecimal: -b34

Square: 8225424

Square Root: 53.55371135598354

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

Site percolation series for triangular lattice: coefficients of the power series expansion in powers of q=1-p of the probability that a given open site belongs to the infinite cluster, where p is the probability that a site is open. A391391

Coordination sequence for octagonal tiling is a(n)*sqrt(2) + A103909(n). A103908

Coordination sequence for "tsi" 3D uniform tiling. A299289

Number of partitions of n such that the least part occurs exactly twice. A96373

Triangle T(n,k), 0 <= k <= n, read by rows, defined by: T(0,0)=1, T(n,k)=0 if k < 0 or if k > n, T(n,0) = 2·T(n-1,0) + T(n-1,1), T(n,k) = T(n-1,k-1) + T(n-1,k+1) for k >= 1. A126075

Base-2 expansion of a(n) encodes the steps where numbers of the form 4k+3 are encountered when map x -> A252463(x) is iterated down to 1, starting from x=n. A292383

Number of integer partitions of n whose length can be written as a nonnegative linear combination of the distinct parts. A367218

Numbers m such that there are precisely 10 groups of order m. A249553

Record gaps between twin primes. A113274

a(1) = 1, a(2) = 3, a(n+2) = 3·a(n+1) + (n+1)²*a(n). A142979