1989996 has 12 divisors (see below), whose sum is σ = 4643352. Its totient is φ = 663328.

The previous prime is 1989989. The next prime is 1990007. The reversal of 1989996 is 6999891.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82905 + ... + 82928.

It is an arithmetic number, because the mean of its divisors is an integer number (386946).

2^1989996 is an apocalyptic number.

It is an amenable number.

1989996 is an abundant number, since it is smaller than the sum of its proper divisors (2653356).

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

1989996 is a wasteful number, since it uses less digits than its factorization.

1989996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165840 (or 165838 counting only the distinct ones).

The product of its digits is 314928, while the sum is 51.

The square root of 1989996 is about 1410.6721802035. The cubic root of 1989996 is about 125.7816829184.

The spelling of 1989996 in words is "one million, nine hundred eighty-nine thousand, nine hundred ninety-six".