989634 has 16 divisors (see below), whose sum is σ = 2083680. Its totient is φ = 312480.

The previous prime is 989629. The next prime is 989641. The reversal of 989634 is 436989.

989634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 989592 and 989601.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4227 + ... + 4454.

It is an arithmetic number, because the mean of its divisors is an integer number (130230).

2⁹⁸⁹⁶³⁴ is an apocalyptic number.

989634 is an abundant number, since it is smaller than the sum of its proper divisors (1094046).

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

989634 is a wasteful number, since it uses less digits than its factorization.

989634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8705.

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

The square root of 989634 is about 994.8034981844. The cubic root of 989634 is about 99.6532658102.

The spelling of 989634 in words is "nine hundred eighty-nine thousand, six hundred thirty-four".