389040 has 40 divisors (see below), whose sum is σ = 1206768. Its totient is φ = 103680.

The previous prime is 389029. The next prime is 389041. The reversal of 389040 is 40983.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 389040.

It is not an unprimeable number, because it can be changed into a prime (389041) by changing a digit.

389040 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, 571 + ... + 1050.

2³⁸⁹⁰⁴⁰ is an apocalyptic number.

389040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

389040 is an abundant number, since it is smaller than the sum of its proper divisors (817728).

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

389040 is a wasteful number, since it uses less digits than its factorization.

389040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637 (or 1631 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 389040 is about 623.7307111246. The cubic root of 389040 is about 73.0014386406.

The spelling of 389040 in words is "three hundred eighty-nine thousand, forty".