Properties of the Number 28994

Twenty-Eight Thousand Nine Hundred Ninety-Four

Basics

Value: 28993 → 28994 → 28995

Parity: even

Prime: No

Previous Prime: 28979

Next Prime: 29009

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 2 × 7 × 19 × 109

Divisors: 1, 2, 7, 14, 19, 38, 109, 133, 218, 266

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111000101000010

Octal: 70502

Duodecimal: 14942

Hexadecimal: 7142

Square: 840652036

Square Root: 170.2762461413805

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

Irregular triangle read by rows: Whitney numbers of the second kind a(n,k), n >= 1, k >= 0, for the star poset. A7799

a(n) = ∑_k=1..n k! * k^n-1 * Stirling1(n,k). A373857

Number of (n+2) X (4+2) 0..3 arrays with every 3 X 3 subblock row and column sum not 2 3 6 or 7 and every diagonal and antidiagonal sum 2 3 6 or 7. A251890

A382168 with duplicates removed. A382169

Numbers k that divide A005554(k) (the sum of consecutive Motzkin numbers). A81741

Numbers n such that n!3 - 3⁷ is prime, where n!3 = n!!! is a triple factorial number (A007661). A267382

Even 10-gonal (or decagonal) numbers. A28994

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and column sum not 2 3 6 or 7 and every diagonal and antidiagonal sum 2 3 6 or 7. A251894

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 2 3 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 2 3 6 or 7. A252260