989430 has 64 divisors (see below), whose sum is σ = 2661120. Its totient is φ = 233856.

The previous prime is 989423. The next prime is 989441. The reversal of 989430 is 34989.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 989391 and 989400.

It is a congruent number.

It is an unprimeable number.

989430 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 31 ways as a sum of consecutive naturals, for example, 16741 + ... + 16799.

It is an arithmetic number, because the mean of its divisors is an integer number (41580).

2⁹⁸⁹⁴³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 989430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1330560).

989430 is an abundant number, since it is smaller than the sum of its proper divisors (1671690).

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

989430 is a wasteful number, since it uses less digits than its factorization.

989430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 989430 is about 994.7009600880. The cubic root of 989430 is about 99.6464179374.

The spelling of 989430 in words is "nine hundred eighty-nine thousand, four hundred thirty".