998906 has 16 divisors (see below), whose sum is σ = 1599360. Its totient is φ = 466560.

The previous prime is 998897. The next prime is 998909. The reversal of 998906 is 609899.

It is a Curzon number.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3551 + ... + 3821.

It is an arithmetic number, because the mean of its divisors is an integer number (99960).

2⁹⁹⁸⁹⁰⁶ is an apocalyptic number.

998906 is a deficient number, since it is larger than the sum of its proper divisors (600454).

998906 is a wasteful number, since it uses less digits than its factorization.

998906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 998906 is about 999.4528503136. The cubic root of 998906 is about 99.9635200271.

The spelling of 998906 in words is "nine hundred ninety-eight thousand, nine hundred six".