Properties of the Number 27985

Twenty-Seven Thousand Nine Hundred Eighty-Five

Basics

Value: 27984 → 27985 → 27986

Parity: odd

Prime: No

Previous Prime: 27983

Next Prime: 27997

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 5 × 29 × 193

Divisors: 1, 5, 29, 145, 193, 965, 5597, 27985

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110110101010001

Octal: 66521

Duodecimal: 14241

Hexadecimal: 6d51

Square: 783160225

Square Root: 167.28717822953436

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 distinct products of subsets of integers in the interval [n²+1, (n+1)²-1] which are twice a square. A99500

Expansion of r(q)⁵ / r(q⁵) in powers of q where r() is the Rogers-Ramanujan continued fraction. A285630

Number of integer compositions of n with all prime parts and all prime run-lengths. A353429

Divide the positive integers into subsets of lengths given by successive primes. a(n) is the sum of primes contained in the n-th subset. A344718

Numbers k such that the continued fraction for sqrt(k) has period 53. A20392

[ (4th elementary symmetric function of S(n))/(2nd elementary symmetric function of S(n)) ], where S(n) = {first n+3 positive integers congruent to 1 mod 4}. A24389

a(n) = ∑_k=0..2·n-1 T(n, k)*T(n, k+1), T given by A027960. A27985