Properties of the Number 9870

Nine Thousand Eight Hundred Seventy

Basics

Value: 9869 → 9870 → 9871

Parity: even

Prime: No

Previous Prime: 9859

Next Prime: 9871

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

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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

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

Triangular numbers with property that digits alternate in parity. A68882

Triangular numbers that are sums of two consecutive primes. A111163

Numbers k which have a factorization k = f1·f2*...*fr where the digits of {k, f1, f2, ..., fr} together give 0,1,...,9 exactly once. A370970