Properties of the Number 28939

Twenty-Eight Thousand Nine Hundred Thirty-Nine

Basics

Value: 28938 → 28939 → 28940

Parity: odd

Prime: No

Previous Prime: 28933

Next Prime: 28949

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 43 × 673

Divisors: 1, 43, 673, 28939

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 111000100001011

Octal: 70413

Duodecimal: 148B7

Hexadecimal: 710b

Square: 837465721

Square Root: 170.11466721009097

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

Records in A007535. A98654

Sum of the digits of the n-th Mersenne prime (A000668). A66538

Number of partitions p of n such that (number of numbers in p of form 3k+1) > (number of numbers in p of form 3k+2). A241739

Odd numbers k such that A064989(k) is in A340151. A340091

a(n) = 1 + n + ((n-1)*n²)/2. A218152

a(n) = 2 + n²*floor((n+3)/2) + floor(3·n/2). A370754

Strong pseudoprimes to base 55. A20281

Strong pseudoprimes to base 73. A20299

a(n) = denominator of y-coordinate of (2n)*P where P is the generator for rational points on the curve y² + y = x³ - x. A28939

Number of (n+1)X(2+1) 0..2 arrays colored with the maximum plus the lower median minus the minimum of every 2X2 subblock. A236605