Properties of the Number 8140

Eight Thousand One Hundred Forty

Basics

Value: 8139 → 8140 → 8141

Parity: even

Prime: No

Previous Prime: 8123

Next Prime: 8147

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 5 × 11 × 37

Divisors: 1, 2, 4, 5, 10, 11, 20, 22, 37, 44

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 1111111001100

Octal: 17714

Duodecimal: 4864

Hexadecimal: 1fcc

Square: 66259600

Square Root: 90.22194854911969

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

Four times pentagonal numbers: a(n) = 2·n*(3·n-1). A33579

Greatest positive integer whose reversed (weakly decreasing) prime indices have weighted sum (A318283) equal to n. A359683

"DHK[ 5 ]" (bracelet, identity, unlabeled, 5 parts) transform of 1,1,1,1,... A32246

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly three ways, and new values 0..3 introduced in row major order. A204642

a(n) = n*(n + 7)*(n + 14)/6. A264444

Number of (unordered) ways of making change for n cents using coins of 1/2, 1, 2, 3, 5, 10, 20, 25, 50, 100 cents (all historical U.S.A. coinage denominations up to 100 cents). A67997

a(n) is the number of partitions of n such that the number of parts having multiplicity > 1 is a part. A241408

Number of purely crossing partitions of [n]. A268814

Number of edges formed in a square by straight line segments when connecting the n+1 points along each edge that divide it into n equal parts to the n+1 points on the edge on the opposite side of the square. A355840

Number of arrays of 2n nondecreasing integers in -3..3 with sum zero and equal numbers greater than zero and less than zero. A203286