990844 has 6 divisors (see below), whose sum is σ = 1733984. Its totient is φ = 495420.

The previous prime is 990841. The next prime is 990851. The reversal of 990844 is 448099.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123852 + ... + 123859.

2⁹⁹⁰⁸⁴⁴ is an apocalyptic number.

It is an amenable number.

990844 is a deficient number, since it is larger than the sum of its proper divisors (743140).

990844 is a wasteful number, since it uses less digits than its factorization.

990844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247715 (or 247713 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 990844 is about 995.4114727086. The cubic root of 990844 is about 99.6938637624.

The spelling of 990844 in words is "nine hundred ninety thousand, eight hundred forty-four".