389890 has 16 divisors (see below), whose sum is σ = 709632. Its totient is φ = 154224.

The previous prime is 389867. The next prime is 389891. The reversal of 389890 is 98983.

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 (389891) by changing a digit.

389890 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, 1117 + ... + 1423.

It is an arithmetic number, because the mean of its divisors is an integer number (44352).

2³⁸⁹⁸⁹⁰ is an apocalyptic number.

389890 is a deficient number, since it is larger than the sum of its proper divisors (319742).

389890 is a wasteful number, since it uses less digits than its factorization.

389890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 389890 is about 624.4117231443. The cubic root of 389890 is about 73.0545660708.

The spelling of 389890 in words is "three hundred eighty-nine thousand, eight hundred ninety".