Properties of the Number 28004

Twenty-Eight Thousand Four

Basics

Value: 28003 → 28004 → 28005

Parity: even

Prime: No

Previous Prime: 28001

Next Prime: 28019

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 7001

Divisors: 1, 2, 4, 7001, 14002, 28004

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 110110101100100

Octal: 66544

Duodecimal: 14258

Hexadecimal: 6d64

Square: 784224016

Square Root: 167.3439571660716

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

a(n) = (A278399(n)² + A278400(n)²)/2. A278420

Coordination sequence for 10-dimensional cubic lattice. A8420

Number of points of L1 norm 5 in cubic lattice Zⁿ. A35599

T(n,k) is the coordination number of the (n+1)-dimensional cubic lattice for radius k; triangle read by rows, n>=0, 0<=k<=n. A343599

a(n) = ∑_k=0..n binomial(2·n,k) * binomial(3·n-k-1,n-k). A370099

Number of nodes in virtual, "optimal", chordal graphs of diameter 5, degree =n+1. A67969

First differences of the dying rabbits sequence A000044. A191869

Numbers k such that 115·2^k+1 is prime. A32407

The numbers n in s=n² + (n+1)² that satisfy the requirement for two consecutive squares c,d with c<d with d-c being the sum of two consecutive squares that c<s<d will give s-c and d-s both being squares. A192743

Array of coordination sequences for cubic lattices (rows) and of numbers of L1 forms in cubic lattices (columns) (array read by antidiagonals). A119800