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Properties of the Number -3186

One Hundred Eighty-Six

Basics

Value: -3187 → -3186 → -3185

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 3 × 59

Divisors: 1, 2, 3, 6, 9, 18, 27, 54, 59, 118

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: Yes

Tetrahedral: No

Today's Target

5184 Try Today's Challenge

Representations

Binary: -110001110010

Octal: -6162

Duodecimal: -1A16

Hexadecimal: -c72

Square: 10150596

Square Root: 56.444663166680336

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) = ∑k=0..n kp*qk, where p=1, q=-2. A232600
Dirichlet inverse of A341529, where A341529(n) = σ(n) * A003961(n), and A003961 is fully multiplicative with a(prime(i)) = prime(i+1). A378229
Heptagonal numbers (or 7-gonal numbers): n*(5·n-3)/2. A566
Number of factorization patterns of polynomials of degree n over integers. A6171
The game of Mousetrap with n cards (given n letters and n envelopes, how many ways are there to fill the envelopes so that at least one letter goes into its right envelope?). A2467
11-gonal (or hendecagonal) numbers: a(n) = n*(9·n-7)/2. A51682
Multiples of 18 containing a 18 in their decimal representation. A121038
Number of regions in a regular drawing of the complete bipartite graph Kn,n. A290131
a(n) = σ(n) * A003961(n), where A003961 shifts the prime factorization of n one step towards larger primes, and σ is the sum of the divisors of n. A341529
Energy function for hexagonal lattice. A7239