Properties of the Number 39820

Thirty-Nine Thousand Eight Hundred Twenty

Basics

Value: 39819 → 39820 → 39821

Parity: even

Prime: No

Previous Prime: 39799

Next Prime: 39821

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 5 × 11 × 181

Divisors: 1, 2, 4, 5, 10, 11, 20, 22, 44, 55

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001101110001100

Octal: 115614

Duodecimal: 1B064

Hexadecimal: 9b8c

Square: 1585632400

Square Root: 199.54949260772375

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) = number of (s(0), s(1), ..., s(n)) such that every s(i) is a nonnegative integer, s(0) = 0, s(1) = 1, s(n) = 4, |s(i) - s(i-1)| <= 1 for i >= 2. Also a(n) = T(n,n-4), where T is the array defined in A026105. A26110

a(n) = round(3*(4/3)ⁿ). A227391

Number of set partitions of [n] with distinct block sizes and one of the block sizes is 2. A327881

Volume (multiplied by 3) of polyhedron formed by points (i,j,k) in Z³ with i²+j²+k² = n². A65089

Table read by antidiagonals: T(n,k) (n >= 3, k >= 0) is the number of cells in a regular n-gon after k generations of mitosis. A350000

Numbers whose square contains the same digit more than 2/3 of the time and does not end in 0. A39820