389940 has 48 divisors (see below), whose sum is σ = 1119552. Its totient is φ = 101376.

The previous prime is 389927. The next prime is 389941. The reversal of 389940 is 49983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389941) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 3972 + ... + 4068.

It is an arithmetic number, because the mean of its divisors is an integer number (23324).

2³⁸⁹⁹⁴⁰ is an apocalyptic number.

389940 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 389940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (559776).

389940 is an abundant number, since it is smaller than the sum of its proper divisors (729612).

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

389940 is a wasteful number, since it uses less digits than its factorization.

389940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 389940 is about 624.4517595459. The cubic root of 389940 is about 73.0576888082.

The spelling of 389940 in words is "three hundred eighty-nine thousand, nine hundred forty".