Properties of the Number 28772

Twenty-Eight Thousand Seven Hundred Seventy-Two

Basics

Value: 28771 → 28772 → 28773

Parity: even

Prime: No

Previous Prime: 28771

Next Prime: 28789

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 7193

Divisors: 1, 2, 4, 7193, 14386, 28772

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 111000001100100

Octal: 70144

Duodecimal: 14798

Hexadecimal: 7064

Square: 827827984

Square Root: 169.62311163281967

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

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the maximum plus the upper median plus the minimum minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one. A237324

Expansion of (1-x)/(1+x+2·x²). A78050

T(n,k)=Number of nXk 0..2 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 3 and at least one element with value (x(i,j)-1) mod 3, and upper left element zero. A230819

Number of partitions of n having an ordering of parts in which no parts of equal parity are adjacent and the first and last terms have the same parity. A239833

Sum of first n terms of A_n (using absolute values of terms). A39928

Becomes prime or 4 after exactly 9 iterations of f(x) = sum of prime factors of x. A48131

Sum of first n terms of A_n (signed values). A100543

Numbers k such that k and k² use only the digits 2, 4, 7, 8 and 9. A137107

Number of nX5 0..2 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 3 and at least one element with value (x(i,j)-1) mod 3, and upper left element zero. A230816

Number of (n+1) X (1+1) 0..2 arrays with the maximum plus the upper median plus the minimum minus the lower median of every 2 X 2 subblock differing from its horizontal and vertical neighbors by exactly one. A237317