389870 has 16 divisors (see below), whose sum is σ = 756000. Its totient is φ = 143904.

The previous prime is 389867. The next prime is 389891. The reversal of 389870 is 78983.

389870 = 130² + 131² + ... + 149².

It is an Ulam number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 389870.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1370 + ... + 1629.

It is an arithmetic number, because the mean of its divisors is an integer number (47250).

2³⁸⁹⁸⁷⁰ is an apocalyptic number.

389870 is a deficient number, since it is larger than the sum of its proper divisors (366130).

389870 is a wasteful number, since it uses less digits than its factorization.

389870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3019.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 389870 is about 624.3957078648. The cubic root of 389870 is about 73.0533169012.

The spelling of 389870 in words is "three hundred eighty-nine thousand, eight hundred seventy".