Properties of the Number 998

Nine Hundred Ninety-Eight

Basics

Value: 997 → 998 → 999

Parity: even

Prime: No

Previous Prime: 997

Next Prime: 1009

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 × 499

Divisors: 1, 2, 499, 998

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111100110

Octal: 1746

Duodecimal: 6B2

Hexadecimal: 3e6

Square: 996004

Square Root: 31.591137997862628

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

Preperiod (or threshold) of orbit of Post's {00, 1101} tag system applied to the word (100)ⁿ, or -1 if this word has an unbounded trajectory. A284119

Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of ∏_j>=1 (1 + j·x^j)^k. A297321

Sum of first n nonprimes. A51349

Number of subsets of {1..n} whose cardinality cannot be written as a nonnegative linear combination of the elements. A367223

Number of partitions of n minus number of divisors of n. A144300

a(n)³ is smallest cube containing exactly n 9's. A48374

Smallest even number with digit sum n. A69532

Numbers that are the sum of 3 nonzero squares in exactly 7 ways. A25327

Number of integer partitions of n whose distinct parts have no binary carries. A247935

Numbers k such that Phi₂₂(k) is prime, where φ is the cyclotomic polynomial. A250178