Properties of the Number 8280

Eight Thousand Two Hundred Eighty

Basics

Value: 8279 → 8280 → 8281

Parity: even

Prime: No

Previous Prime: 8273

Next Prime: 8287

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ³ × 3 ² × 5 × 23

Divisors: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000001011000

Octal: 20130

Duodecimal: 4960

Hexadecimal: 2058

Square: 68558400

Square Root: 90.9945053286186

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

8 times triangular numbers: a(n) = 4·n*(n+1). A33996

Denominators of Cauchy numbers of first type. A6233

Ruth-Aaron numbers (2): sum of prime divisors of n = sum of prime divisors of n+1 (both taken with multiplicity). A39752

Number T(n,k) of set partitions of [n] such that k is the largest element of the last block; triangle T(n,k), n>=1, 1<=k<=n, read by rows. A271466

Regular tetrangle where T(n,k,i) is the number of pairs of set partitions of {1,...,n} with meet of length k and join of length i. A318393

a(n) = Bell(n)*(2 - 0ⁿ). A186021

Number of partitions of n such that 2*(least part) <= greatest part. A237821

Number of integer partitions of n whose length times maximum is a multiple of n. A326849

T(n,k)=Number of length n+3 0..k arrays with no disjoint pairs in any consecutive four terms having the same sum. A247726

Numbers divisible by prime(d+1) for each digit d of their base-10 representation. A256870