Properties of the Number -3905

Nine Hundred Five

Basics

Value: -3906 → -3905 → -3904

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 5 × 11 × 71

Divisors: 1, 5, 11, 55, 71, 355, 781, 3905

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -111101000001

Octal: -7501

Duodecimal: -2315

Hexadecimal: -f41

Square: 15249025

Square Root: 62.489999199871974

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

Square array T(n,k), n >= 1, k >= 1, read by antidiagonals, where column k is the expansion of e.g.f. -log(1 - f^k-1(x)), where f(x) = log(1+x). A351420

Expansion of e.g.f. -log(1 - log(1 + log(1 + log(1+x)))). A351422

a(n) = 8·a(n-1) - a(n-2); a(0) = 0, a(1) = 1. A1090

Period of the sequence of Bell numbers A000110 (mod n). A54767

Numbers m such that there are precisely 7 groups of order m. A249550

A(n,k) = ∑_i=1..k nⁱ; square array A(n,k), n>=0, k>=0, read by antidiagonals. A228275

a(n) = ∑_d∣n (2^n-d). A74854

a(n) = 4·n² - 6·n + 1. A125202

Number of singular 2 X 2 matrices having all elements in {-n,...,n}. A209981

T(n,k)=Number of length n 0..k arrays with each partial sum starting from the beginning no more than sqrt(2) standard deviations from its mean. A244903