The Number

1998

One Thousand Nine Hundred and Ninety-Eight

Nearby Numbers

Positive, nonzero integers within three units

1995
One Thousand Nine Hundred and Ninety-Five
1996
One Thousand Nine Hundred and Ninety-Six
1997
One Thousand Nine Hundred and Ninety-Seven
1999
One Thousand Nine Hundred and Ninety-Nine
2000
Two Thousand
2001
Two Thousand and One

Scientific Notation

Scientific notation expresses a quantity as the product of its significand with 10 raised to an integer exponent.

1.998e3

Reciprocal

A number multiplied with its reciprocal is one.

0.0005005005005005005

The reciprocal of 1998.

Palindrome?

A numerical palindrome has the same value when all of its digits are reversed.

The number 1998 is not a palindrome.

Not A Prime Number

A prime number is a positive integer that is divisible only by itself and one.

One thousand nine hundred and ninety-eight is a composite number with 16 total factors (including 1 and itself).   See primes in Base 10 Decimal

A Composite

Composites have more than just these two factors.

One thousand nine hundred and ninety-eight is a composite number with 16 total factors (including 1 and itself).

Prime Factors

The prime factors of a positive integer are the integers that divide it exactly and are also prime.

The number one thousand nine hundred and ninety-eight has the following 3 prime factors:

2
Two
3
Three
37
Thirty-Seven

Prime Factorization

The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities

21 · 33 · 371 = 1998

Base Conversions

The number one thousand nine hundred and ninety-eight in 35 different bases