1998006 has 16 divisors (see below), whose sum is σ = 4038384. Its totient is φ = 658944.

The previous prime is 1997999. The next prime is 1998019. The reversal of 1998006 is 6008991.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1135 + ... + 2298.

It is an arithmetic number, because the mean of its divisors is an integer number (252399).

2^1998006 is an apocalyptic number.

1998006 is an abundant number, since it is smaller than the sum of its proper divisors (2040378).

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

1998006 is a wasteful number, since it uses less digits than its factorization.

1998006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3535.

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

The square root of 1998006 is about 1413.5084011070. The cubic root of 1998006 is about 125.9502196903.

The spelling of 1998006 in words is "one million, nine hundred ninety-eight thousand, six".