998224 has 20 divisors (see below), whose sum is σ = 1958580. Its totient is φ = 492800.

The previous prime is 998219. The next prime is 998237. The reversal of 998224 is 422899.

It can be written as a sum of positive squares in 2 ways, for example, as 535824 + 462400 = 732^2 + 680^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 998224.

It is a congruent number.

It is an unprimeable 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, 1074 + ... + 1774.

It is an arithmetic number, because the mean of its divisors is an integer number (97929).

2⁹⁹⁸²²⁴ is an apocalyptic number.

It is an amenable number.

998224 is a deficient number, since it is larger than the sum of its proper divisors (960356).

998224 is a wasteful number, since it uses less digits than its factorization.

998224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798 (or 792 counting only the distinct ones).

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

The square root of 998224 is about 999.1116053775. Note that the first 3 decimals coincide. The cubic root of 998224 is about 99.9407649190.

The spelling of 998224 in words is "nine hundred ninety-eight thousand, two hundred twenty-four".