ℕ atory
Play Now

Properties of the Number 28080

Twenty-Eight Thousand Eighty

Basics

Value: 28079 → 28080 → 28081

Parity: even

Prime: No

Previous Prime: 28069

Next Prime: 28081

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 4 × 3 3 × 5 × 13

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

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 110110110110000

Octal: 66660

Duodecimal: 14300

Hexadecimal: 6db0

Square: 788486400

Square Root: 167.5708805252273

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

Number of double-free subsets of {1, 2, ..., n}. A50291
Number of 6-ary Lyndon words of length n with trace 3 and subtrace 5 over Z6. A74445
Number of 6-ary Lyndon words of length n with trace 0 and subtrace 5 over Z6. A74427
Values of the difference d for 6 primes in arithmetic progression with the minimal start sequence {7 + j·d}, j = 0 to 5. A206040
Number of permutations of [n] where adjacent cycles differ in size. A286072
Number of maximal subsets of {1..n} containing n such that no two elements have the same sorted prime signature. A325365
Number of nonnegative solutions of x12 + x22 + ... + x102 = n. A45852
a(n) = 2·binomial(4·n + 8, n)/(n + 2). A233666
Solutions·of uphi(x)/x = 2/3, where uphi is the unitary φ function (A047994). A305678
Number of maximal subsets of {1..n} such that no two elements have the same sorted prime signature. A326439