Properties of the Number -9870

Eight Hundred Seventy

Basics

Value: -9871 → -9870 → -9869

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 5 × 7 × 47

Divisors: 1, 2, 3, 5, 6, 7, 10, 14, 15, 21

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

5184 Try Today's Challenge

Representations

Binary: -10011010001110

Octal: -23216

Duodecimal: -5866

Hexadecimal: -268e

Square: 97416900

Square Root: 99.34787365615834

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

Sequence is {a(5,n)}, where a(m,n) is defined at sequence A110665. A110670

G.f. satisfies: A(x) = 1 + x·d/dx log(1 + x/A(x)). A159606

Bessel polynomial {y_n}''(-1). A65944

Products of exactly 5 distinct primes. A46387

Least number k such that all coefficients of k·B(n,x), the n-th Bernoulli polynomial, are integers. A144845

a(n) = 2·n*(4·n + 1). A33585

Numbers that are divisible by exactly 5 different primes. A51270

a(n) is the smallest positive integer such that a(n)*(1ⁿ + 2ⁿ + ... + xⁿ) is a polynomial in·with integer coefficients. A64538

Number T(n,k) of ordered partitions of an n-set with nondecreasing block sizes and maximal block size equal to k; triangle T(n,k), n>=0, 0<=k<=n, read by rows. A262071

Positive integers not expressible as the sum of a prime and a triangular number. A76768