989556 has 12 divisors (see below), whose sum is σ = 2308992. Its totient is φ = 329848.

The previous prime is 989533. The next prime is 989557. The reversal of 989556 is 655989.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41220 + ... + 41243.

It is an arithmetic number, because the mean of its divisors is an integer number (192416).

2⁹⁸⁹⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

989556 is an abundant number, since it is smaller than the sum of its proper divisors (1319436).

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

989556 is a wasteful number, since it uses less digits than its factorization.

989556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82470 (or 82468 counting only the distinct ones).

The product of its digits is 97200, while the sum is 42.

The square root of 989556 is about 994.7642936897. The cubic root of 989556 is about 99.6506476170.

The spelling of 989556 in words is "nine hundred eighty-nine thousand, five hundred fifty-six".