Properties of the Number 78492

Seventy-Eight Thousand Four Hundred Ninety-Two

Basics

Value: 78491 → 78492 → 78493

Parity: even

Prime: No

Previous Prime: 78487

Next Prime: 78497

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 2 ² × 3 × 31 × 211

Divisors: 1, 2, 3, 4, 6, 12, 31, 62, 93, 124

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10011001010011100

Octal: 231234

Duodecimal: 39510

Hexadecimal: 1329c

Square: 6160994064

Square Root: 280.16423754647917

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 T(n,k) of tilings of a 5 X n rectangle with pentominoes of any shape and exactly k pentominoes of shape Y; triangle T(n,k), n>=0, read by rows. A247712

E.g.f. satisfies A(x) = (1 + x·exp(x·A(x)))². A161632

Irregular table read by rows: Take a Reuleaux triangle with all diagonals drawn, as in A340639. Then T(n,k) = number of k-sided polygons in that figure for k >= 3. A340614

No-prime decades. A78492

Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 0 1 0 vertically. A208082