1989108 has 36 divisors (see below), whose sum is σ = 5486208. Its totient is φ = 602640.

The previous prime is 1989107. The next prime is 1989131. The reversal of 1989108 is 8019891.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989101) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2116 + ... + 2907.

2^1989108 is an apocalyptic number.

1989108 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1989108 is an abundant number, since it is smaller than the sum of its proper divisors (3497100).

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

1989108 is a wasteful number, since it uses less digits than its factorization.

1989108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5044 (or 5039 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 1989108 is about 1410.3574015121. The cubic root of 1989108 is about 125.7629708620.

The spelling of 1989108 in words is "one million, nine hundred eighty-nine thousand, one hundred eight".