389505 has 16 divisors (see below), whose sum is σ = 650880. Its totient is φ = 198528.

The previous prime is 389483. The next prime is 389507. The reversal of 389505 is 505983.

It is not a de Polignac number, because 389505 - 2¹⁰ = 388481 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (389507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220 + ... + 909.

It is an arithmetic number, because the mean of its divisors is an integer number (40680).

2³⁸⁹⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

389505 is a deficient number, since it is larger than the sum of its proper divisors (261375).

389505 is a wasteful number, since it uses less digits than its factorization.

389505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 389505 is about 624.1033568248. The cubic root of 389505 is about 73.0305120464.

The spelling of 389505 in words is "three hundred eighty-nine thousand, five hundred five".