Properties of the Number -2990

Nine Hundred Ninety

Basics

Value: -2991 → -2990 → -2989

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 5 × 13 × 23

Divisors: 1, 2, 5, 10, 13, 23, 26, 46, 65, 115

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101110101110

Octal: -5656

Duodecimal: -1892

Hexadecimal: -bae

Square: 8940100

Square Root: 54.680892457969264

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

G.f.: ∑_n>=1 ∑_k=0..n binomial(n,k) * x^k² * (xⁿ - x^k)^n-k, ignoring the constant term. A292808

Primitive abundant numbers (abundant numbers all of whose proper divisors are deficient numbers). A71395

Numbers whose base-2 representation is the juxtaposition of two identical strings. A20330

Primitive nondeficient numbers. A6039

Numbers n such that the decimal expansions of both n and n² have 0 as smallest digit and 9 as largest digit. A256709

Numbers m such that there are precisely 8 groups of order m. A249551

Number of regions in regular n-gon which are quadrilaterals (4-gons) when all its diagonals are drawn. A67151

Molien series for cyclic group of order 5. A8646

Number of ways to partition n elements into pie slices of different sizes. A32153

Primitive pseudoperfect numbers. A6036