Properties of the Number 28620

Twenty-Eight Thousand Six Hundred Twenty

Basics

Value: 28619 → 28620 → 28621

Parity: even

Prime: No

Previous Prime: 28619

Next Prime: 28621

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ² × 3 ³ × 5 × 53

Divisors: 1, 2, 3, 4, 5, 6, 9, 10, 12, 15

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110111111001100

Octal: 67714

Duodecimal: 14690

Hexadecimal: 6fcc

Square: 819104400

Square Root: 169.1744661584602

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

Numbers n such that n | sigma₁₃(n). A55717

Szeged index of the grid graph P₃ X P_n. A245827

Second convolution of A001405 (central binomial numbers). A54442

Averages of twin primes such that p1·p2 -+ AverageTwinPrime are primes. A154668

Partial sums of A160410. A160799

Number of n X 4 0..1 arrays with rows and antidiagonals unimodal and columns nondecreasing. A224142

Exponential (2,4)-perfect numbers: numbers m such that esigma(esigma(m)) = 4m, where esigma(m) is the sum of exponential divisors of m (A051377). A328133

Triangle read by rows: T(n,k) is the coefficient of t^k (k>=0) in the polynomial P[n,t] defined by P[1,t] = P[2,t] = 1, P[3,t] = 1+t, P[n,t] = P[n-1,t] + P²[n-2,1] for n >= 4. A103525

Expansion of (theta₃(z)*theta₃(13z)+theta₂(z)*theta₂(13z))⁴. A28620

Rolling icosahedron footprints: number of 3 X n 0..11 arrays starting with 0 where 0..11 label vertices of an icosahedron and every array movement to a horizontal, diagonal or antidiagonal neighbor moves along an icosahedral edge. A223235