998320 has 20 divisors (see below), whose sum is σ = 2321280. Its totient is φ = 399296.

The previous prime is 998311. The next prime is 998329. The reversal of 998320 is 23899.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (998311) and next prime (998329).

It is a tau number, because it is divible by the number of its divisors (20).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998329) by changing a digit.

998320 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6160 + ... + 6319.

It is an arithmetic number, because the mean of its divisors is an integer number (116064).

2⁹⁹⁸³²⁰ is an apocalyptic number.

It is an amenable number.

998320 is an abundant number, since it is smaller than the sum of its proper divisors (1322960).

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

998320 is a wasteful number, since it uses less digits than its factorization.

998320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12492 (or 12486 counting only the distinct ones).

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

The square root of 998320 is about 999.1596469033. The cubic root of 998320 is about 99.9439686107.

The spelling of 998320 in words is "nine hundred ninety-eight thousand, three hundred twenty".