989428 has 24 divisors (see below), whose sum is σ = 1915200. Its totient is φ = 443520.

The previous prime is 989423. The next prime is 989441. The reversal of 989428 is 824989.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989423) by changing a digit.

989428 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 4873 + ... + 5071.

It is an arithmetic number, because the mean of its divisors is an integer number (79800).

2⁹⁸⁹⁴²⁸ is an apocalyptic number.

It is an amenable number.

989428 is a deficient number, since it is larger than the sum of its proper divisors (925772).

989428 is a wasteful number, since it uses less digits than its factorization.

989428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327 (or 325 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 989428 is about 994.6999547602. The cubic root of 989428 is about 99.6463507967.

The spelling of 989428 in words is "nine hundred eighty-nine thousand, four hundred twenty-eight".