998398 has 8 divisors (see below), whose sum is σ = 1523160. Its totient is φ = 490680.

The previous prime is 998381. The next prime is 998399. The reversal of 998398 is 893899.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4113 + ... + 4348.

It is an arithmetic number, because the mean of its divisors is an integer number (190395).

2⁹⁹⁸³⁹⁸ is an apocalyptic number.

998398 is a deficient number, since it is larger than the sum of its proper divisors (524762).

998398 is a wasteful number, since it uses less digits than its factorization.

998398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8522.

The product of its digits is 139968, while the sum is 46.

The square root of 998398 is about 999.1986789423. The cubic root of 998398 is about 99.9465714590.

The spelling of 998398 in words is "nine hundred ninety-eight thousand, three hundred ninety-eight".