Properties of the Number 28521

Twenty-Eight Thousand Five Hundred Twenty-One

Basics

Value: 28520 → 28521 → 28522

Parity: odd

Prime: No

Previous Prime: 28517

Next Prime: 28537

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 3169

Divisors: 1, 3, 9, 3169, 9507, 28521

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111101101001

Octal: 67551

Duodecimal: 14609

Hexadecimal: 6f69

Square: 813447441

Square Root: 168.88161534045085

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 ordered quadruples of integers from [ 1..n ] with no global factor. A15634

Number of free linear polycubes of size n, identifying rotations and reflections. A363202

Numbers n such that the sum of the divisors of n is of the form m²+1. A289290

Coefficients of 1/(∑_k>=0 [(k+1)*r]*(-x)^k), where r = 4^1/3 and [ ] = floor. A288231

p-INVERT of (1,1,0,0,0,0,...), where p(S) = 1 - S - S² - 2 S³. A291410

Number of nonnegative integer 3 X 3 matrices with no zero rows or columns and with sum of elements equal to n. A55005

G.f.: 1 / (1 + 6·x*G(x) - 7·x*G(x)²), where G(x) = 1 + x·G(x)³ is the g.f. of A001764. A226751

Character of extremal vertex operator algebra of rank 72. A28521