389785 has 16 divisors (see below), whose sum is σ = 538560. Its totient is φ = 267840.

The previous prime is 389783. The next prime is 389791. The reversal of 389785 is 587983.

389785 = T₇₄ + T₇₅ + ... + T₁₃₉.

It is not a de Polignac number, because 389785 - 2¹ = 389783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389783) 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, 859 + ... + 1231.

It is an arithmetic number, because the mean of its divisors is an integer number (33660).

389785 is a Friedman number, since it can be written as 95*(8*8^3+7), using all its digits and the basic arithmetic operations.

2³⁸⁹⁷⁸⁵ is an apocalyptic number.

It is an amenable number.

389785 is a deficient number, since it is larger than the sum of its proper divisors (148775).

389785 is a wasteful number, since it uses less digits than its factorization.

389785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408.

The product of its digits is 60480, while the sum is 40.

The square root of 389785 is about 624.3276383438. The cubic root of 389785 is about 73.0480074533.

It can be divided in two parts, 38978 and 5, that added together give a palindrome (38983).

The spelling of 389785 in words is "three hundred eighty-nine thousand, seven hundred eighty-five".