Properties of the Number 7398

Seven Thousand Three Hundred Ninety-Eight

Basics

Value: 7397 → 7398 → 7399

Parity: even

Prime: No

Previous Prime: 7393

Next Prime: 7411

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ³ × 137

Divisors: 1, 2, 3, 6, 9, 18, 27, 54, 137, 274

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1110011100110

Octal: 16346

Duodecimal: 4346

Hexadecimal: 1ce6

Square: 54730404

Square Root: 86.0116271209887

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 points on surface of octahedron; also coordination sequence for cubic lattice: a(0) = 1; for n > 0, a(n) = 4n² + 2. A5899

Generalized 23-gonal (or icositrigonal) numbers: m*(21·m - 19)/2 with m = 0, +1, -1, +2, -2, +3, -3, ... A303303

Numbers k such that A102489(k) is divisible by k. A32563

a(n) = (2·n - 1)*(3·n² - 3·n + 2)/2. A63491

a(n) = |{m : multiplicative order of 7 mod m=n}|. A59889

a(n) = ∑_k=1..n lcm(n,k). A51193

Number of convex quadrilaterals on an n X n grid (or geoboard). A189413

Maximal kissing number of n-dimensional laminated lattice. A2336

a(n) = smallest number k such that ∏_i=1..k prime(i)/(prime(i)-1) > n. A5579

23-gonal numbers: a(n) = n(21n-19)/2. A51875