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Properties of the Number 27880

Twenty-Seven Thousand Eight Hundred Eighty

Basics

Value: 27879 → 27880 → 27881

Parity: even

Prime: No

Previous Prime: 27851

Next Prime: 27883

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 3 × 5 × 17 × 41

Divisors: 1, 2, 4, 5, 8, 10, 17, 20, 34, 40

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110110011101000

Octal: 66350

Duodecimal: 14174

Hexadecimal: 6ce8

Square: 777294400

Square Root: 166.97305171793442

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 0 0 1 horizontally and 0 0 0 and 0 1 0 vertically. A208078
T(n,k)=Number of (n+2)X(k+2) binary arrays avoiding patterns 000 and 010 in rows and columns. A202406
T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 2 3 or 4. A252343
Triangle read by rows: T(n,k) is the number of unlabeled weakly graded (ranked) posets with n elements and rank k. A361953
Number of asymmetric mobiles (cycle rooted trees) with n nodes and 2-colored internal (non-leaf) nodes. A108532
a(n) = 4*(4 + 9·n2 + 15·n). A144449
Number of (n+2)X3 binary arrays avoiding patterns 000 and 010 in rows and columns. A202399
Primitive triangle numbers as defined in A218243. A218392
The total number of different isosceles trapezoids, excluding squares, that can be drawn on an n X n square grid where the corners of each individual trapezoid lie on a lattice point. A272459
a(n) = 17·n*(n+1). A173308