998584 has 8 divisors (see below), whose sum is σ = 1872360. Its totient is φ = 499288.

The previous prime is 998561. The next prime is 998617. The reversal of 998584 is 485899.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 998584.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62404 + ... + 62419.

It is an arithmetic number, because the mean of its divisors is an integer number (234045).

2⁹⁹⁸⁵⁸⁴ is an apocalyptic number.

It is an amenable number.

998584 is a deficient number, since it is larger than the sum of its proper divisors (873776).

998584 is a wasteful number, since it uses less digits than its factorization.

998584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124829 (or 124825 counting only the distinct ones).

The product of its digits is 103680, while the sum is 43.

The square root of 998584 is about 999.2917491904. The cubic root of 998584 is about 99.9527777041.

The spelling of 998584 in words is "nine hundred ninety-eight thousand, five hundred eighty-four".