Properties of the Number 19438

Nineteen Thousand Four Hundred Thirty-Eight

Basics

Value: 19437 → 19438 → 19439

Parity: even

Prime: No

Previous Prime: 19433

Next Prime: 19441

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 × 9719

Divisors: 1, 2, 9719, 19438

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100101111101110

Octal: 45756

Duodecimal: B2BA

Hexadecimal: 4bee

Square: 377835844

Square Root: 139.42022808760572

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

Starting index of a string of exactly 4 consecutive equal digits in decimal expansion of π. A49520

Starting index of a string of 4 or more consecutive equal digits in decimal expansion of π. A49516

Numbers n such that the trinomial xⁿ + x + 1 is irreducible over GF(7). A58857

Starting positions of strings of three 9's in the decimal expansion of π. A83642

Numbers k such that 6!*(2·k-7)!/(k!*(k-1)!) is an integer. A4786

Binomial transform of [1, 2, 3, 4, 0, 0, 0, ...]. A139488

Numbers k such that 7!*(2k-8)!/(k!*(k-1)!) is an integer. A4787

Number of nX5 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0 or 2 neighboring 1s. A296332

Number of nX5 0..1 arrays with every element equal to 0, 1, 2 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero. A302066

Squarefree orders of elements of Mathieu group M₂₃. A19438