Properties of the Number 30248

Thirty Thousand Two Hundred Forty-Eight

Basics

Value: 30247 → 30248 → 30249

Parity: even

Prime: No

Previous Prime: 30241

Next Prime: 30253

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 ³ × 19 × 199

Divisors: 1, 2, 4, 8, 19, 38, 76, 152, 199, 398

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 111011000101000

Octal: 73050

Duodecimal: 15608

Hexadecimal: 7628

Square: 914941504

Square Root: 173.91952161847732

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

G.f. satisfies: A(x - 3·A(x)²) = x + A(x)². A276363

Union_{odd primes p, n >= 3} {T_p(n)}, where T_m(x) = x·T_m-1(x) - T_m-2(x), m >= 2, T₀(x) = 2, T₁(x) = x (dilated Chebyshev polynomials of the first kind). A299071

Starts for strings of at least five consecutive nonsquarefree numbers. A78144

T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the sum of all four elements of every 2X2 subblock equal. A237015

Rectangular array read by antidiagonals: a(m,n) = 2·Integral_t>=0 T_n((t+m)/2)*exp(-t)*dt, m>=0, n>=0, where T_n(x) is n-th Chebyshev polynomial of first kind. A300480

Number of non-equivalent ways to tile an n X n X n triangular area with three 2 X 2 X 2 triangular tiles and an appropriate number (= n²-12) of 1 X 1 X 1 tiles. A286445

Expansion of ∏_{i>=1, j>=0} (1 + x^{i·7^j}) / (1 - x^{i·7^j}). A393559

a(n) = 8·a(n-1) - a(n-2), starting with a(0) = 2 and a(1) = 8. A86903

a(n) = n⁵ - 5·n³ + 5·n. A230586

Numbers that are the sum of distinct primorial numbers (A002110) (not including 1). A290249