Properties of the Number 3858

Three Thousand Eight Hundred Fifty-Eight

Basics

Value: 3857 → 3858 → 3859

Parity: even

Prime: No

Previous Prime: 3853

Next Prime: 3863

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 643

Divisors: 1, 2, 3, 6, 643, 1286, 1929, 3858

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 111100010010

Octal: 7422

Duodecimal: 2296

Hexadecimal: f12

Square: 14884164

Square Root: 62.112800613078136

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

Twice-partitioned numbers where the first partition is constant. A279787

Triangular array that counts rooted polyominoes. A38622

G.f. satisfies: A(x - A(x)²) = x + 2·A(x)². A276360

a(1) = 1, a(n+1) = ∑_{k = 1..n} p(k)*a(n+1-k), where p(k) is the k-th prime. A30017

Expansion of g.f.: (1-3·x*C)/(1-4·x*C) where C = (1 - sqrt(1-4·x))/(2·x) = g.f. for Catalan numbers A000108. A76025

Expansion of 1/∑_k>=0 x^k². A317665

Positions of 1's in A274640: Greedy Queens on a spiral. Equivalently, positions of 0's in A274641. A273059

a(n) = (9·n² + 5·n + 2)/2. A64225

Positions of 15 after decimal point in decimal expansion of π. A134215

Number of subsets of {1..n} containing n and some element equal to the sum of two other (possibly equal) elements. A365070