Properties of the Number 2860

Two Thousand Eight Hundred Sixty

Basics

Value: 2859 → 2860 → 2861

Parity: even

Prime: No

Previous Prime: 2857

Next Prime: 2861

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 5 × 11 × 13

Divisors: 1, 2, 4, 5, 10, 11, 13, 20, 22, 26

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101100101100

Octal: 5454

Duodecimal: 17A4

Hexadecimal: b2c

Square: 8179600

Square Root: 53.47896782848375

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

Number of fixed points in range [A014137(n-1)..A014138(n-1)] of permutation A089864. A89408

Number of (w,x,y) such that w,x,y are all in {0,...,n} and |w-x| = |x-y|. A212959

Expansion of sqrt(1 - 4·x) in powers of x. A2420

Numbers whose base-2 representation is the juxtaposition of two identical strings. A20330

Array T(i,j) = binomial(-1/2-i,j)*(-4)^j, i,j >= 0 read by antidiagonals going down. A46521

Irregular triangle read by rows: T(n,k) is the number of binary pattern classes in the (4,n)-rectangular grid with k '1's and (4n-k) '0's: two patterns are in same class if one of them can be obtained by a reflection or 180-degree rotation of the other. A225812

Four times pentagonal numbers: a(n) = 2·n*(3·n-1). A33579

Expansion of (1 + x·C)*C, where C = (1 - (1 - 4·x)^1/2)/(2·x) is the g.f. for Catalan numbers, A000108. A68875

Irregular triangle read by rows: T(n,k) is the number of binary pattern classes in the (8,n)-rectangular grid with k '1's and (8n-k) '0's: two patterns are in the same class if one of them can be obtained by a reflection or 180-degree rotation of the other. A228167

Number of partitions of n into distinct parts with 2 levels of parentheses. A50343