Properties of the Number 38720

Thirty-Eight Thousand Seven Hundred Twenty

Basics

Value: 38719 → 38720 → 38721

Parity: even

Prime: No

Previous Prime: 38713

Next Prime: 38723

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ⁶ × 5 × 11 ²

Divisors: 1, 2, 4, 5, 8, 10, 11, 16, 20, 22

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1001011101000000

Octal: 113500

Duodecimal: 1A4A8

Hexadecimal: 9740

Square: 1499238400

Square Root: 196.7739820199815

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

9-gonal (or enneagonal) pyramidal numbers: a(n) = n*(n+1)*(7·n-4)/6. A7584

Triangle read by rows: T(n,k) is the number of ascent sequences of length n with maximal element k-1. A218577

Numbers with 42 divisors. A175750

Number of 2 X 2 matrices having all terms in {1,...,n} and positive odd determinant. A211068

Numbers of the form p⁶*q²*r where p, q, and r are distinct primes. A179703

Number of defective (binary) heaps on 2n elements from the set {0,1} with exactly n defects. A372489

Number of unsigned permutations in S_3n-1 whose breakpoint graph contains only cycles of length 3. A178217

Even 9-gonal (nonagonal) pyramidal numbers. A218329

Number of length 4+2 0..n arrays with the sum of second differences squared multiplied by some arrangement of +-1 equal to zero. A250323

a(n) = (n+3)*n!/2. A38720