Properties of the Number 6490

Six Thousand Four Hundred Ninety

Basics

Value: 6489 → 6490 → 6491

Parity: even

Prime: No

Previous Prime: 6481

Next Prime: 6491

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 × 5 × 11 × 59

Divisors: 1, 2, 5, 10, 11, 22, 55, 59, 110, 118

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 1100101011010

Octal: 14532

Duodecimal: 390A

Hexadecimal: 195a

Square: 42120100

Square Root: 80.56053624449132

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

Generalized 30-gonal (or triacontagonal) numbers: m*(14·m - 13) with m = 0, +1, -1, +2, -2, +3, -3, ... A316729

Numbers whose deficiency is 20: σ(k) - 2·k = -20. A223607

a(n) = 1 + ∑_i=1..n (n-i+1)*φ(i). A5598

T(n,k) = number of length n 1..(k+2) arrays with no leading or trailing partial sum equal to a prime and no consecutive values equal. A254218

Number of ways to place 2 nonattacking bishops on an n X n board. A172123

30-gonal numbers: a(n) = n*(14·n-13). A254474

Numbers having exactly three prime gaps in their factorization. A73495

Numbers k such that σ(k) == 0 (mod k-10). A274566

Sums of five consecutive squares: a(n) = n² + (n+1)² + (n+2)² + (n+3)² + (n+4)². A27578

Expansion of ∏_n>=1 ((1 + 2·xⁿ)/(1 - 2·xⁿ))^1/2. A303346