389820 has 48 divisors (see below), whose sum is σ = 1118880. Its totient is φ = 101376.

The previous prime is 389819. The next prime is 389839. The reversal of 389820 is 28983.

389820 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 389820.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4336 + ... + 4424.

It is an arithmetic number, because the mean of its divisors is an integer number (23310).

2³⁸⁹⁸²⁰ is an apocalyptic number.

389820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (559440).

389820 is an abundant number, since it is smaller than the sum of its proper divisors (729060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

389820 is a wasteful number, since it uses less digits than its factorization.

389820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 389820 is about 624.3556678689. The cubic root of 389820 is about 73.0501937900.

The spelling of 389820 in words is "three hundred eighty-nine thousand, eight hundred twenty".