Properties of the Number 9880

Nine Thousand Eight Hundred Eighty

Basics

Value: 9879 → 9880 → 9881

Parity: even

Prime: No

Previous Prime: 9871

Next Prime: 9883

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 ³ × 5 × 13 × 19

Divisors: 1, 2, 4, 5, 8, 10, 13, 19, 20, 26

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: Yes

Today's Target

8509 Try Today's Challenge

Representations

Binary: 10011010011000

Octal: 23230

Duodecimal: 5874

Hexadecimal: 2698

Square: 97614400

Square Root: 99.39818911831343

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

Tetrahedral (or triangular pyramidal) numbers: a(n) = C(n+2,3) = n*(n+1)*(n+2)/6. A292

Sum of the first n even squares: a(n) = 2·n*(n+1)*(2·n+1)/3. A2492

Row sums of A168281. A168380

T(n,k)=Number of (n+1)X(k+1) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having directed index change -1,1 -1,2 1,0 or 0,-1. A264550

16-gonal (or hexadecagonal) numbers: a(n) = n*(7·n-6). A51868

Number of pairs of functions f, g from a size n set into itself satisfying f(g(f(x))) = f(f(f(x))). A239773

Number of compositions of n into 4 ordered relatively prime parts. A742

T(n,k)=Number of arrays of 2n nondecreasing integers in -k..k with sum zero and equal numbers greater than zero and less than zero. A203291

T(n,k) is the number of n X k 0..3 arrays with values 0..3 introduced in row major order and each element equal to no more than two horizontal and vertical neighbors. A200801

Sum of the second largest parts of the partitions of n into 8 squarefree parts. A326451