Properties of the Number 69280

Sixty-Nine Thousand Two Hundred Eighty

Basics

Value: 69279 → 69280 → 69281

Parity: even

Prime: No

Previous Prime: 69263

Next Prime: 69313

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 ⁵ × 5 × 433

Divisors: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000111010100000

Octal: 207240

Duodecimal: 34114

Hexadecimal: 10ea0

Square: 4799718400

Square Root: 263.21094202179364

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) = n! * ∑_k=1..n-1 1/k!. A38156

Number of L-shaped tiles in all tilings of a 3 X n board with 1 X 1 and L-shaped tiles (where the L-shaped tiles cover 3 squares). A127869

Larger of Smith brothers. A50220

Triangle read by rows: T(i,j) for the recurrence T(i,j) = (T(i-1,j) + 1)*i. A121662

a(0)=1, a(n) = n*(a(n-1) - 1) for n>0. A166554

Triangle read by rows: T(m,n) = ∑_i=1..n P(m,i) where P(m,n) = m!/(m-n)! is the number of permutations of m items taken n at a time, for 1 <= n <= m. A285268

Multiply by 1, add 1, multiply by 2, add 2, etc. A82459

Number of cells in a regular 7-gon after n generations of mitosis. A349808

Expansion of e.g.f. (exp(x)-x)*x/(1-x). A296964

19-almost primes (generalization of semiprimes). A69280