389678 has 4 divisors (see below), whose sum is σ = 584520. Its totient is φ = 194838.

The previous prime is 389663. The next prime is 389687. The reversal of 389678 is 876983.

It is a semiprime because it is the product of two primes.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

389678 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97418 + ... + 97421.

It is an arithmetic number, because the mean of its divisors is an integer number (146130).

2³⁸⁹⁶⁷⁸ is an apocalyptic number.

389678 is a deficient number, since it is larger than the sum of its proper divisors (194842).

389678 is a wasteful number, since it uses less digits than its factorization.

389678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194841.

The product of its digits is 72576, while the sum is 41.

The square root of 389678 is about 624.2419402764. The cubic root of 389678 is about 73.0413226980.

The spelling of 389678 in words is "three hundred eighty-nine thousand, six hundred seventy-eight".