1989328 has 40 divisors (see below), whose sum is σ = 4285440. Its totient is φ = 887040.

The previous prime is 1989307. The next prime is 1989329. The reversal of 1989328 is 8239891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989329) 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 7 ways as a sum of consecutive naturals, for example, 15601 + ... + 15727.

It is an arithmetic number, because the mean of its divisors is an integer number (107136).

2^1989328 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 1989328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2142720).

1989328 is an abundant number, since it is smaller than the sum of its proper divisors (2296112).

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

1989328 is a wasteful number, since it uses less digits than its factorization.

1989328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 229 counting only the distinct ones).

The product of its digits is 31104, while the sum is 40.

The square root of 1989328 is about 1410.4353937703. The cubic root of 1989328 is about 125.7676072507.

The spelling of 1989328 in words is "one million, nine hundred eighty-nine thousand, three hundred twenty-eight".