Properties of the Number 30440

Thirty Thousand Four Hundred Forty

Basics

Value: 30439 → 30440 → 30441

Parity: even

Prime: No

Previous Prime: 30431

Next Prime: 30449

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 2 ³ × 5 × 761

Divisors: 1, 2, 4, 5, 8, 10, 20, 40, 761, 1522

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 111011011101000

Octal: 73350

Duodecimal: 15748

Hexadecimal: 76e8

Square: 926593600

Square Root: 174.4706279005151

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

T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 1 0 0 vertically. A207661

a(n) = n*(2*(n - 2)*n + (-1)ⁿ + 3)/4. A323724

Sum of the first n twin prime pairs. A86169

The least common multiple of 1+n and 1+n². A281660

Number of collinear triples in a 3 X n rectangular grid. A57566

Triangle read by rows: T(n,k) (0 <= k <= ceiling(n/2)-1) is the number of (1,0) steps at level k in all peakless Motzkin paths of length n (can be easily translated into RNA secondary structure terminology). A110237

Number of nX4 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 1 0 0 vertically. A207657

Number of 7Xn 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 1 0 0 vertically. A207665

Quotients associated with A097982. A98024

Values of Newton-Gregory forward interpolating polynomial (1/3)*(n-1)*(2·n+3)*(2·n-1). A30440