Properties of the Number 7838

Seven Thousand Eight Hundred Thirty-Eight

Basics

Value: 7837 → 7838 → 7839

Parity: even

Prime: No

Previous Prime: 7829

Next Prime: 7841

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 × 3919

Divisors: 1, 2, 3919, 7838

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 1111010011110

Octal: 17236

Duodecimal: 4652

Hexadecimal: 1e9e

Square: 61434244

Square Root: 88.53247991556545

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

Partial sums of A299291. A299292

a(n) is the smallest integer such that the sum of any three ordered terms a(k), k <= n, is unique. A51912

a(1)=1; thereafter, a(n) is the smallest number such that both the addition and multiplication tables for (a(1),...,a(n)) contain n*(n+1)/2 different entries (the maximum possible). A337655

Number of positive integers <= 10ⁿ that are divisible by no prime exceeding 11. A107352

Column 1 of triangle A152406; also, column 0 of matrix square of A152406. A152408

Triangle T, read by rows, where column k of T = column 0 of matrix power T^k+1 for k>0, with column 0 of T = column 1 of T² (shifted). A152406

Triangle T(n,d) (listed row-wise: T(1,1)=1, T(2,1)=1, T(2,2)=1, T(3,1)=2, T(3,2)=2, T(3,3)=1, ...) giving the number of n-edge general plane trees with root degree d that are fixed by the four-fold application of Catalan Automorphisms A057511/A057512 (Deep rotation of general parenthesizations/plane trees). A79220

Numbers k such that the sum of the first k primes is prime and the sum of the squares of the first k primes is also prime. A124225

Number of distinct sums i² + j² + k² + l² for 1<=i<=j<=k<=l<=n. A374716

a(2·n) = n·a(n); a(2·n+1) = n·a(n) + a(n+1), with a(1) = 1. A176528