990328 has 8 divisors (see below), whose sum is σ = 1856880. Its totient is φ = 495160.

The previous prime is 990323. The next prime is 990329. The reversal of 990328 is 823099.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 990328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990323) 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 as a sum of consecutive naturals, namely, 61888 + ... + 61903.

It is an arithmetic number, because the mean of its divisors is an integer number (232110).

2⁹⁹⁰³²⁸ is an apocalyptic number.

It is an amenable number.

990328 is a deficient number, since it is larger than the sum of its proper divisors (866552).

990328 is a wasteful number, since it uses less digits than its factorization.

990328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123797 (or 123793 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 990328 is about 995.1522496583. The cubic root of 990328 is about 99.6765549610.

The spelling of 990328 in words is "nine hundred ninety thousand, three hundred twenty-eight".