Properties of the Number 40239

Forty Thousand Two Hundred Thirty-Nine

Basics

Value: 40238 → 40239 → 40240

Parity: odd

Prime: No

Previous Prime: 40237

Next Prime: 40241

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 17 × 263

Divisors: 1, 3, 9, 17, 51, 153, 263, 789, 2367, 4471

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1001110100101111

Octal: 116457

Duodecimal: 1B353

Hexadecimal: 9d2f

Square: 1619177121

Square Root: 200.59661014084958

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 arrays of the minimum value of corresponding elements and their horizontal, diagonal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 nXk array. A219883

Denominators of continued fraction convergents to sqrt(508). A41971

Number of nX4 arrays of the minimum value of corresponding elements and their horizontal, diagonal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 nX4 array. A219879

Number of nX7 0..1 arrays with every element unequal to 0, 1, 3 or 5 king-move adjacent elements, with upper left element zero. A303968

Number of 7Xn arrays of the minimum value of corresponding elements and their horizontal, diagonal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 7Xn array. A219888

T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 1, 3 or 5 king-move adjacent elements, with upper left element zero. A303969

Continued fraction for sqrt(255). A40239