389895 has 32 divisors (see below), whose sum is σ = 725760. Its totient is φ = 176640.

The previous prime is 389891. The next prime is 389897. The reversal of 389895 is 598983.

It is not a de Polignac number, because 389895 - 2² = 389891 is a prime.

It is a super-2 number, since 2×389895² = 304036222050, which contains 22 as substring.

389895 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389891) 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 31 ways as a sum of consecutive naturals, for example, 2736 + ... + 2874.

It is an arithmetic number, because the mean of its divisors is an integer number (22680).

389895 is a Friedman number, since it can be written as 5^8-(9+3^8)/9, using all its digits and the basic arithmetic operations.

2³⁸⁹⁸⁹⁵ is an apocalyptic number.

389895 is the 510-th pentagonal number.

389895 is a deficient number, since it is larger than the sum of its proper divisors (335865).

389895 is a wasteful number, since it uses less digits than its factorization.

389895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175.

The product of its digits is 77760, while the sum is 42.

The square root of 389895 is about 624.4157269000. The cubic root of 389895 is about 73.0548783566.

It can be divided in two parts, 3898 and 95, that added together give a palindrome (3993).

The spelling of 389895 in words is "three hundred eighty-nine thousand, eight hundred ninety-five".