389181 has 16 divisors (see below), whose sum is σ = 592704. Its totient is φ = 225024.

The previous prime is 389173. The next prime is 389189. The reversal of 389181 is 181983.

It is an interprime number because it is at equal distance from previous prime (389173) and next prime (389189).

It is not a de Polignac number, because 389181 - 2³ = 389173 is a prime.

It is a super-2 number, since 2×389181² = 302923701522, which contains 22 as substring.

It is a Curzon number.

389181 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 389181.

It is not an unprimeable number, because it can be changed into a prime (389189) 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, 370 + ... + 956.

It is an arithmetic number, because the mean of its divisors is an integer number (37044).

2³⁸⁹¹⁸¹ is an apocalyptic number.

It is an amenable number.

389181 is a deficient number, since it is larger than the sum of its proper divisors (203523).

389181 is a wasteful number, since it uses less digits than its factorization.

389181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620.

The product of its digits is 1728, while the sum is 30.

The square root of 389181 is about 623.8437304325. The cubic root of 389181 is about 73.0102568937.

The spelling of 389181 in words is "three hundred eighty-nine thousand, one hundred eighty-one".