998358 has 8 divisors (see below), whose sum is σ = 1996728. Its totient is φ = 332784.

The previous prime is 998353. The next prime is 998377. The reversal of 998358 is 853899.

It is a sphenic number, since it is the product of 3 distinct primes.

998358 is an admirable number.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 998358.

It is not an unprimeable number, because it can be changed into a prime (998353) by changing a digit.

998358 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, 83191 + ... + 83202.

It is an arithmetic number, because the mean of its divisors is an integer number (249591).

2⁹⁹⁸³⁵⁸ is an apocalyptic number.

998358 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

998358 is a wasteful number, since it uses less digits than its factorization.

998358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166398.

The product of its digits is 77760, while the sum is 42.

The square root of 998358 is about 999.1786627025. The cubic root of 998358 is about 99.9452366819.

The spelling of 998358 in words is "nine hundred ninety-eight thousand, three hundred fifty-eight".