Properties of the Number 28712

Twenty-Eight Thousand Seven Hundred Twelve

Basics

Value: 28711 → 28712 → 28713

Parity: even

Prime: No

Previous Prime: 28711

Next Prime: 28723

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ³ × 37 × 97

Divisors: 1, 2, 4, 8, 37, 74, 97, 148, 194, 296

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 111000000101000

Octal: 70050

Duodecimal: 14748

Hexadecimal: 7028

Square: 824378944

Square Root: 169.44615663980107

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

Difference between the product of two consecutive primes and the next prime. A111071

Expansion of x/((1 - x - x⁴)*(1 - x)⁴). A145133

G.f.: 1/(1 - x/(1+2·x - x³/(1+2·x² - x⁵/(1+2·x³ - x⁷/(1+2·x⁴ - x⁹/(1 - ...)))))), a continued fraction. A275761

Number of length n+5 0..1 arrays with at most two downsteps in every 5 consecutive neighbor pairs. A256813

Number of length n+2 0..1 arrays with at most two downsteps in every n consecutive neighbor pairs. A256817

Total number of graceful labelings of the n-pan graph. A333729

Indices of primes which remain prime if any one digit is deleted (leading zeros allowed). A84375

T(n,k) = Number of length n+k 0..1 arrays with at most two downsteps in every k consecutive neighbor pairs. A256816

a(n) = ∑_k=0..n ((2k+1)*C(n,k)*C(n+k,k))², where C(n,k) denotes the binomial coefficient n!/(k!*(n-k)!). A246461

Expansion of (theta₃(z)*theta₃(5z)*theta₃(25z)+theta₂(z)*theta₂(5z)*theta₂(25z))³. A28712