Properties of the Number -27991

Twenty-Seven Thousand Nine Hundred Ninety-One

Basics

Value: -27992 → -27991 → -27990

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 23 × 1217

Divisors: 1, 23, 1217, 27991

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110110101010111

Octal: -66527

Duodecimal: -14247

Hexadecimal: -6d57

Square: 783496081

Square Root: 167.3051105017417

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

Numbers that have 10 terms in their Zeckendorf representation. A179250

Absolute discriminants of complex quadratic fields with 3-class group of type (3,3), 3-principalization type (4443), IPAD [(3,3,3)³, (3,9)], and Hilbert 3-class field tower of unknown length at least 3. A242873

a(n) = dot_product(1,2,...,n)*(7,8,...,n,1,2,3,4,5,6). A26049

Expansion of g.f. A(x) satisfying 1 = ∑_n=-oo..+oo xⁿ * (x^2·n - A(x))ⁿ. A358937

Number of two-rowed partitions of length 4. A70557

Number of connected 2-element multiantichains on a labeled n-set. A94734

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 515", based on the 5-celled von Neumann neighborhood. A272707

Absolute discriminants of complex quadratic fields with 3-class group of type (3,3) whose second 3-class group is located on the sporadic part of the coclass graph G(3,2) outside of coclass trees. A247691