Properties of the Number -2490

Four Hundred Ninety

Basics

Value: -2491 → -2490 → -2489

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 5 × 83

Divisors: 1, 2, 3, 5, 6, 10, 15, 30, 83, 166

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100110111010

Octal: -4672

Duodecimal: -1536

Hexadecimal: -9ba

Square: 6200100

Square Root: 49.8998997994986

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

Expansion of 1/(1+3·x*c(x)), c(x) the g.f. of Catalan numbers A000108. A126982

Row sums of inverse of sequence array for Euler φ function. A106480

Expansion of e.g.f. tanh(arcsin(x) + log(x+1)). A12906

Expansion of e.g.f.: tanh(sinh(x)+log(x+1))=2·x-1/2!*x²-13/3!*x³+42/4!*x⁴+237/5!*x⁵... A13020

Number of compositions (ordered partitions) of n that are concave-down sequences. A70211

Generalized 15-gonal (or pentadecagonal) numbers: n*(13·n - 11)/2, n = 0,+1,-1,+2,-2,+3,-3, ... A277082

Triangular array read by rows associated with Schroeder numbers: T(1,k) = 1; T(n,k) = 0 if k < n; T(n,k) = T(n,k-1) + T(n-1,k-1) + T(n-1,k). A33877

Numbers m such that there are precisely 8 groups of order m. A249551

15-gonal (or pentadecagonal) numbers: n*(13n-11)/2. A51867

Numbers divisible by prime(d) for each digit d in their base-4 representation, none of which may be zero. A256874