Properties of the Number 91440

Ninety-One Thousand Four Hundred Forty

Basics

Value: 91439 → 91440 → 91441

Parity: even

Prime: No

Previous Prime: 91433

Next Prime: 91453

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ⁴ × 3 ² × 5 × 127

Divisors: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10110010100110000

Octal: 262460

Duodecimal: 44B00

Hexadecimal: 16530

Square: 8361273600

Square Root: 302.39047604049966

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

a(n) = (n-1)!*(2ⁿ-1) for n>=1, a(0)=0. A29767

T(n,k) = number of (n+1) X (k+1) 0..3 arrays with no 2 X 2 subblock having the number of clockwise edge increases equal to the number of counterclockwise edge increases in its adjacent leftward or upward neighbors. A205944

Distribution of maximum inversion table entry. A56151

Exponential Riordan array [1, log((1-x)/(1-2x))]. A131222

Matrix product of unsigned Lah-triangle |A008297(n,k)| and unsigned Stirling1-triangle |A008275(n,k)|. A79638

Triangle T, read by rows, equal to the matrix inverse of the triangle defined by [T^-1](n,k) = A075263(n,k)/n!, for n>=k>=0. A106338

Array read by ascending antidiagonals. A(n, k) = k! * [x^k] log((1 - x) / (1 - 2·x)) / (1 - x)ⁿ, for 0 <= k <= n. A355257

Diagonal of A056151. A56197

Numbers in A075728 which are not one less than some prime. A179232

Number of (n+1) X 2 0..3 arrays with no 2 X 2 subblock having the number of clockwise edge increases equal to the number of counterclockwise edge increases in its adjacent leftward or upward neighbors. A205937