1998006000 has 160 divisors (see below), whose sum is σ = 6509875008. Its totient is φ = 527155200.

The previous prime is 1998005983. The next prime is 1998006001. The reversal of 1998006000 is 6008991.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998006001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 580284 + ... + 583716.

Almost surely, 2^1998006000 is an apocalyptic number.

1998006000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1998006000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3254937504).

1998006000 is an abundant number, since it is smaller than the sum of its proper divisors (4511869008).

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

1998006000 is a wasteful number, since it uses less digits than its factorization.

1998006000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3556 (or 3540 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 1998006000 is about 44699.0603928092. The cubic root of 1998006000 is about 1259.5021969030.

The spelling of 1998006000 in words is "one billion, nine hundred ninety-eight million, six thousand".