Properties of the Number 18489

Eighteen Thousand Four Hundred Eighty-Nine

Basics

Value: 18488 → 18489 → 18490

Parity: odd

Prime: No

Previous Prime: 18481

Next Prime: 18493

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 6163

Divisors: 1, 3, 6163, 18489

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100100000111001

Octal: 44071

Duodecimal: A849

Hexadecimal: 4839

Square: 341843121

Square Root: 135.9742622704753

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 integer partitions of n such that the maximum is greater than twice the median. A361857

Number of immersions of the unoriented circle into the unoriented plane with n double points. A8983

a(n) = ∑_k=1..n binomial(floor(n/k)+2,3). A364970

a(n) = 2·n³ - 2·n + 9. A127989

Zeroless numbers n such that the products of the decimal digits of n and n² coincide. A257760

Triangle read by rows: T(n,k) = number of noncrossing path sets on n nodes up to rotation and reflection with k paths and isolated vertices allowed. A303868

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 74 ones. A31842

a(n) = A168174(n)-10¹². A168248

Number of nondecreasing sequences of n 1..7 integers with every element dividing the sequence sum. A212535

Number of (n+1) X (3+1) 0..1 arrays with every 2 X 2 subblock diagonal minus antidiagonal sum nondecreasing horizontally and vertically. A253154