989812 has 12 divisors (see below), whose sum is σ = 1739556. Its totient is φ = 492800.

The previous prime is 989803. The next prime is 989827. The reversal of 989812 is 218989.

It can be written as a sum of positive squares in 2 ways, for example, as 646416 + 343396 = 804^2 + 586^2 .

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

It is a congruent number.

It is an unprimeable number.

989812 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 1062 + ... + 1762.

It is an arithmetic number, because the mean of its divisors is an integer number (144963).

2⁹⁸⁹⁸¹² is an apocalyptic number.

It is an amenable number.

989812 is a deficient number, since it is larger than the sum of its proper divisors (749744).

989812 is a wasteful number, since it uses less digits than its factorization.

989812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058 (or 1056 counting only the distinct ones).

The product of its digits is 10368, while the sum is 37.

The square root of 989812 is about 994.8929590665. The cubic root of 989812 is about 99.6592401462.

The spelling of 989812 in words is "nine hundred eighty-nine thousand, eight hundred twelve".