998508 has 24 divisors (see below), whose sum is σ = 2662912. Its totient is φ = 285264.

The previous prime is 998497. The next prime is 998513. The reversal of 998508 is 805899.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

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 998508.

It is an unprimeable number.

998508 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 7 ways as a sum of consecutive naturals, for example, 5860 + ... + 6027.

2⁹⁹⁸⁵⁰⁸ is an apocalyptic number.

It is an amenable number.

998508 is an abundant number, since it is smaller than the sum of its proper divisors (1664404).

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

998508 is a wasteful number, since it uses less digits than its factorization.

998508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11901 (or 11899 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 998508 is about 999.2537215342. The cubic root of 998508 is about 99.9502419121.

The spelling of 998508 in words is "nine hundred ninety-eight thousand, five hundred eight".