998285 has 4 divisors (see below), whose sum is σ = 1197948. Its totient is φ = 798624.

The previous prime is 998281. The next prime is 998287. The reversal of 998285 is 582899.

998285 = 706² + 707².

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 499849 + 498436 = 707^2 + 706^2 .

It is a cyclic number.

It is not a de Polignac number, because 998285 - 2² = 998281 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998281) 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 in 3 ways as a sum of consecutive naturals, for example, 99824 + ... + 99833.

It is an arithmetic number, because the mean of its divisors is an integer number (299487).

2⁹⁹⁸²⁸⁵ is an apocalyptic number.

998285 is the 707-th centered square number.

It is an amenable number.

998285 is a deficient number, since it is larger than the sum of its proper divisors (199663).

998285 is a wasteful number, since it uses less digits than its factorization.

998285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199662.

The product of its digits is 51840, while the sum is 41.

The square root of 998285 is about 999.1421320313. The cubic root of 998285 is about 99.9428006219.

The spelling of 998285 in words is "nine hundred ninety-eight thousand, two hundred eighty-five".