Properties of the Number 7646

Seven Thousand Six Hundred Forty-Six

Basics

Value: 7645 → 7646 → 7647

Parity: even

Prime: No

Previous Prime: 7643

Next Prime: 7649

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 × 3823

Divisors: 1, 2, 3823, 7646

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1110111011110

Octal: 16736

Duodecimal: 4512

Hexadecimal: 1dde

Square: 58461316

Square Root: 87.4414089547967

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

Triangle read by rows giving number of arrangements of k dumbbells on 2 X n grid (n >= 0, k >= 0). A46741

Expansion of series_reversion( x/(1 + sum(k>=1, x^A032766(k)) ) ) / x. A215340

G.f. A(x) satisfies A(x) = 1 + x·A(x)⁴*A(-x)². A143550

Number of closed binary words of length n. A226452

Triangle, read by rows, such that row n equals the coefficients of x^n²+n-1+k in F(x,n) for k = 1..n, where F(x,n) = (1 + x·F(x,n))*(1 + xⁿ/F(x,n)), for n>=1. A200171

Number of subsets of {1..n} containing at least one element that is a sum of distinct non-elements. A384350

a(n) = Min{x : A073124(x) = 2n}. A96480

Numbers k such that k, k² - 5, and k² + 5 are semiprime. A173085

G.f.: exp( ∑_n>=1 (3ⁿ + A(x))ⁿ * xⁿ/n ). A202630

a(n) = ceiling((n + 7/10)³). A34133