989436 has 24 divisors (see below), whose sum is σ = 2638720. Its totient is φ = 282672.

The previous prime is 989423. The next prime is 989441. The reversal of 989436 is 634989.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

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

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 989394 and 989403.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 989436.

It is an unprimeable number.

989436 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 7 ways as a sum of consecutive naturals, for example, 5806 + ... + 5973.

2⁹⁸⁹⁴³⁶ is an apocalyptic number.

It is an amenable number.

989436 is an abundant number, since it is smaller than the sum of its proper divisors (1649284).

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

989436 is a wasteful number, since it uses less digits than its factorization.

989436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11793 (or 11791 counting only the distinct ones).

The product of its digits is 46656, while the sum is 39.

The square root of 989436 is about 994.7039760652. The cubic root of 989436 is about 99.6466193589.

The spelling of 989436 in words is "nine hundred eighty-nine thousand, four hundred thirty-six".