Properties of the Number -2387

Three Hundred Eighty-Seven

Basics

Value: -2388 → -2387 → -2386

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 7 × 11 × 31

Divisors: 1, 7, 11, 31, 77, 217, 341, 2387

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100101010011

Octal: -4523

Duodecimal: -146B

Hexadecimal: -953

Square: 5697769

Square Root: 48.85693400122443

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

Expansion of exp( ∑_n>=1 -σ(6·n)*xⁿ/n ) in powers of x. A283164

Expansion of 8 * η(q)⁷ / η(q⁷) + 49 * (η(q) * η(q⁷))³ in powers of q. A138809

Expansion of x²*(-1+x+x²)/(-1+x+x²-x³+x⁵). A107332

a(n) = 7 + 12·n - 6·n². A157517

Number of integer partitions of n such that it is not possible to choose a different prime factor of each part. A370593

Sum of composite numbers between successive primes. A54265

a(n) = n*(5·n - 1)/2. A5476

Sums of maximal runs of non-prime-powers. A373678

Nonnegative values·of solutions (x, y) to the Diophantine equation x² + (x + 97)² = y². A129836

Numbers k with property that average digit of k² is s=7. A164773