989406 has 48 divisors (see below), whose sum is σ = 2471040. Its totient is φ = 282960.

The previous prime is 989381. The next prime is 989411. The reversal of 989406 is 604989.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3631 + ... + 3893.

It is an arithmetic number, because the mean of its divisors is an integer number (51480).

2⁹⁸⁹⁴⁰⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 989406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1235520).

989406 is an abundant number, since it is smaller than the sum of its proper divisors (1481634).

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

989406 is a wasteful number, since it uses less digits than its factorization.

989406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 989406 is about 994.6888960876. The cubic root of 989406 is about 99.6456122434.

The spelling of 989406 in words is "nine hundred eighty-nine thousand, four hundred six".