998904 has 16 divisors (see below), whose sum is σ = 2497320. Its totient is φ = 332960.

The previous prime is 998897. The next prime is 998909. The reversal of 998904 is 409899.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998909) by changing a digit.

998904 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, 20787 + ... + 20834.

2⁹⁹⁸⁹⁰⁴ is an apocalyptic number.

It is an amenable number.

998904 is an abundant number, since it is smaller than the sum of its proper divisors (1498416).

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

998904 is a wasteful number, since it uses less digits than its factorization.

998904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41630 (or 41626 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 998904 is about 999.4518497657. The cubic root of 998904 is about 99.9634533117.

The spelling of 998904 in words is "nine hundred ninety-eight thousand, nine hundred four".