998604 has 18 divisors (see below), whose sum is σ = 2524340. Its totient is φ = 332856.

The previous prime is 998561. The next prime is 998617. The reversal of 998604 is 406899.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 27739 = 998604 / (9 + 9 + 8 + 6 + 0 + 4).

It is a zygodrome in base 2.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 998604.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13834 + ... + 13905.

2⁹⁹⁸⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

998604 is an abundant number, since it is smaller than the sum of its proper divisors (1525736).

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

998604 is a wasteful number, since it uses less digits than its factorization.

998604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27749 (or 27744 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 998604 is about 999.3017562278. The cubic root of 998604 is about 99.9534449963.

The spelling of 998604 in words is "nine hundred ninety-eight thousand, six hundred four".