1998208 has 32 divisors (see below), whose sum is σ = 4057560. Its totient is φ = 979968.

The previous prime is 1998181. The next prime is 1998209. The reversal of 1998208 is 8028991.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×1998208² = 7985670422528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8460 + ... + 8692.

2^1998208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1998208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2028780).

1998208 is an abundant number, since it is smaller than the sum of its proper divisors (2059352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1998208 is an equidigital number, since it uses as much as digits as its factorization.

1998208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 1998208 is about 1413.5798527144. The cubic root of 1998208 is about 125.9544641031.

The spelling of 1998208 in words is "one million, nine hundred ninety-eight thousand, two hundred eight".