Properties of the Number 18879

Eighteen Thousand Eight Hundred Seventy-Nine

Basics

Value: 18878 → 18879 → 18880

Parity: odd

Prime: No

Previous Prime: 18869

Next Prime: 18899

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 3 × 7 × 29 × 31

Divisors: 1, 3, 7, 21, 29, 31, 87, 93, 203, 217

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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2196 Try Today's Challenge

Representations

Binary: 100100110111111

Octal: 44677

Duodecimal: AB13

Hexadecimal: 49bf

Square: 356416641

Square Root: 137.40087335966973

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) = (-6·n⁷ + 154·n⁶ - 1533·n⁵ + 7525·n⁴ - 18879·n³ + 22561·n² - 7302·n + 2520)/2520. A161710

Positive integers m such that π(m²) = π(j²) + π(k²) for no 0 < j <= k < m. A262408

Numbers that are the sum of one or more consecutive squares in more than one way. A130052

Numbers that are sums of 2 or more consecutive squares in more than 1 way. A62681

T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 1, 2, 3 or 6 king-move adjacent elements, with upper left element zero. A304472

Nonnegative values·of solutions (x, y) to the Diophantine equation x²+(x+881)² = y². A130014

Numbers of the form 110 + p². (where p is a prime). A138693

Numbers that can be written as the sum of four or more consecutive squares in more than one way. A307937

Difference between the cubes and 2·tetrahedral numbers; A000578(n) - 2·A000292(n). A146298

Number of nX5 0..1 arrays with every element unequal to 0, 1, 2, 3 or 6 king-move adjacent elements, with upper left element zero. A304469