989678 has 8 divisors (see below), whose sum is σ = 1489320. Its totient is φ = 493240.

The previous prime is 989671. The next prime is 989687. The reversal of 989678 is 876989.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248 + ... + 1428.

It is an arithmetic number, because the mean of its divisors is an integer number (186165).

2⁹⁸⁹⁶⁷⁸ is an apocalyptic number.

989678 is a deficient number, since it is larger than the sum of its proper divisors (499642).

989678 is a wasteful number, since it uses less digits than its factorization.

989678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602.

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

The square root of 989678 is about 994.8256128589. The cubic root of 989678 is about 99.6547426790.

The spelling of 989678 in words is "nine hundred eighty-nine thousand, six hundred seventy-eight".