989628 has 12 divisors (see below), whose sum is σ = 2309160. Its totient is φ = 329872.

The previous prime is 989623. The next prime is 989629. The reversal of 989628 is 826989.

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

It is a self number, because there is not a number n which added to its sum of digits gives 989628.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989623) by changing a digit.

989628 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41223 + ... + 41246.

It is an arithmetic number, because the mean of its divisors is an integer number (192430).

2⁹⁸⁹⁶²⁸ is an apocalyptic number.

It is an amenable number.

989628 is an abundant number, since it is smaller than the sum of its proper divisors (1319532).

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

989628 is a wasteful number, since it uses less digits than its factorization.

989628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82476 (or 82474 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 989628 is about 994.8004825089. The cubic root of 989628 is about 99.6530644156.

The spelling of 989628 in words is "nine hundred eighty-nine thousand, six hundred twenty-eight".