Properties of the Number -26867

Twenty-Six Thousand Eight Hundred Sixty-Seven

Basics

Value: -26868 → -26867 → -26866

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 67 × 401

Divisors: 1, 67, 401, 26867

Polygonal

Triangular: No

Square: No

Pentagonal: Yes

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110100011110011

Octal: -64363

Duodecimal: -1366B

Hexadecimal: -68f3

Square: 721835689

Square Root: 163.91156152022955

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

Number of integer compositions of n whose leaders of strictly increasing runs are weakly increasing. A374690

Semiprimes of the form n*(3·n-1)/2. A245365

a(n) is the number of integer partitions of n for which the greatest part minus the least part is equal to the index of the seaweed algebra formed by the integer partition paired with its weight. A318176

Pentagonal numbers (A000326) whose digit reversal is a semiprime (A001358). A115709

Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 49", based on the 5-celled von Neumann neighborhood. A285558

a(n) = n * ∑_d∣n σ(d)³ / d. A344043

Odd composites (including 1 in the count) where the number 3 mod 4 equals the number 1 mod 4. A93181

Semiprimes sp such that sp plus its digit sum is a perfect square. A244733

Smallest number m such that prime(n) is a factor of both m and σ(m). A156099

Semiprimes of the form p(6p - 1). A330409