Properties of the Number -2228

Two Hundred Twenty-Eight

Basics

Value: -2229 → -2228 → -2227

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 557

Divisors: 1, 2, 4, 557, 1114, 2228

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: -100010110100

Octal: -4264

Duodecimal: -1358

Hexadecimal: -8b4

Square: 4963984

Square Root: 47.20169488482379

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 (φ(-q) / φ(-q⁵))² in powers of q where φ() is a Ramanujan θ function. A138518

Expansion of 1/(1 + ∑_i>=1 q^i²/∏_j=1..i (1 + q^j)²). A294407

McKay-Thompson series of class 20D for Monster. A58553

Number of partitions of n in which each part occurs an odd number (or zero) times. A55922

Years in which there are five Fridays in the month of February. A141287

a(n) = 1 + ∑_i=1..n (n-i+1)*φ(i). A5598

Number of partitions p of n such that (number of distinct parts of p) <= max(p) - min(p). A239955

T(n,k)=Number of length n+5 0..k arrays with every six consecutive terms having the maximum of some two terms equal to the minimum of the remaining four terms. A250081

Numbers n such that P(4n) is prime, where P(m) is the number of partitions of m. A111045

T(n,k) = Number of length n+3 0..k arrays with no four consecutive terms having the sum of any three elements equal to three times the fourth. A249290