Properties of the Number 30861

Thirty Thousand Eight Hundred Sixty-One

Basics

Value: 30860 → 30861 → 30862

Parity: odd

Prime: No

Previous Prime: 30859

Next Prime: 30869

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ⁵ × 127

Divisors: 1, 3, 9, 27, 81, 127, 243, 381, 1143, 3429

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 111100010001101

Octal: 74215

Duodecimal: 15A39

Hexadecimal: 788d

Square: 952401321

Square Root: 175.6729916634882

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 integer partitions of n whose run-sums are not weakly decreasing. A357878

Expansion of χ(x⁵)⁶ + x * χ(x)⁶ in powers of·where χ() is a Ramanujan θ function. A240948

Sum of squares of numbers less than n that do not divide n. A276984

Terms of A046337 for which A358777 is zero, where the latter is the Dirichlet inverse of former's characteristic function. A359607

Coefficient array for the third power of the monic integer Chebyshev polynomials 2·T(2·n+1,x/2)/x as a function of x². A219235

Numbers k that divide s(k), where s(1)=1, s(j)=19·s(j-1)+j. A14869

The hyper-Wiener index of Wang's helicene-based dendrimer defined pictorially as DNS₂[n] in the Shabani et al. reference. A224462

Number of (n+1)X(4+1) 0..2 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction. A250938

[ exp(17/19)*n! ]. A30861

Sum of the components of twin prime pairs less than the 10ⁿ-th prime. A118493