Properties of the Number 39900

Thirty-Nine Thousand Nine Hundred

Basics

Value: 39899 → 39900 → 39901

Parity: even

Prime: No

Previous Prime: 39887

Next Prime: 39901

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 ² × 3 × 5 ² × 7 × 19

Divisors: 1, 2, 3, 4, 5, 6, 7, 10, 12, 14

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001101111011100

Octal: 115734

Duodecimal: 1B110

Hexadecimal: 9bdc

Square: 1592010000

Square Root: 199.74984355438178

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) = n²*(n² - 1)/4. A6011

a(n) = (1/4)*floor(n/2)*floor((n-1)/2)*floor((n-2)/2)*floor((n-3)/2). A28723

Numbers n that raised to the powers from 1 to k (with k>=1) are multiple of the sum of their digits (n raised to k+1 must not be a multiple). Case k=9. A135194

Triangle read by rows: T(n,k) gives number of r-bicoverings of an n-set with k blocks, n >= 2, k = 3..n+floor(n/2). A60052

A partition product of Stirling₂ type [parameter k = -3] with biggest-part statistic (triangle read by rows). A157399

Partial sums of A007585. A51797

Triangle read by rows: T(n,k) is the number of digraphs on n labeled nodes with k arcs and a global source and sink, n >= 1, k = 0..max(1,n-1)*(n-2)+1. A350791

Subdiagonal of array of n-gonal numbers A081422. A81423

Coefficient triangle of the associated Laguerre polynomials of order 1. A199577

a(n) = (n-3)*A006918(n-2)/2 for n >= 2, with a(0) = a(1) = 0. A38376