998678 has 16 divisors (see below), whose sum is σ = 1617840. Its totient is φ = 460800.

The previous prime is 998653. The next prime is 998681. The reversal of 998678 is 876899.

It is a congruent number.

It is an unprimeable number.

998678 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, 1238 + ... + 1878.

It is an arithmetic number, because the mean of its divisors is an integer number (101115).

2⁹⁹⁸⁶⁷⁸ is an apocalyptic number.

998678 is a deficient number, since it is larger than the sum of its proper divisors (619162).

998678 is a wasteful number, since it uses less digits than its factorization.

998678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703.

The product of its digits is 217728, while the sum is 47.

The square root of 998678 is about 999.3387813950. The cubic root of 998678 is about 99.9559139003.

The spelling of 998678 in words is "nine hundred ninety-eight thousand, six hundred seventy-eight".