Properties of the Number 7440

Seven Thousand Four Hundred Forty

Basics

Value: 7439 → 7440 → 7441

Parity: even

Prime: No

Previous Prime: 7433

Next Prime: 7451

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 ⁴ × 3 × 5 × 31

Divisors: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1110100010000

Octal: 16420

Duodecimal: 4380

Hexadecimal: 1d10

Square: 55353600

Square Root: 86.2554346113913

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

Total number of possible knight moves on an (n+2) X (n+2) chessboard, if the knight is placed anywhere. A35008

a(n) = 4·n² - 7·n + 4. A54567

Ordered areas of primitive Pythagorean triangles. A24406

Numbers k such that A102489(k) is divisible by k. A32563

a(n) = floor(n*(n-1)*(n-2)/4). A11886

Areas of right triangles with coprime integer sides. A24365

a(n) = n*(n+1)*(2·n+1). A55112

T(n,k) = Number of n X k 0..2 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. A280398

Numbers of the form p⁴*q·r*s where p, q, r, and s are distinct primes. A179693

T(n,k)=Number of length-n 0..k arrays with no repeated value differing from the previous repeated value by other than plus two, zero or minus 1. A269619