385989 has 4 divisors (see below), whose sum is σ = 514656. Its totient is φ = 257324.

The previous prime is 385967. The next prime is 385991. The reversal of 385989 is 989583.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 385989 - 2¹¹ = 383941 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 385989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385939) 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 3 ways as a sum of consecutive naturals, for example, 64329 + ... + 64334.

It is an arithmetic number, because the mean of its divisors is an integer number (128664).

2³⁸⁵⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

385989 is a deficient number, since it is larger than the sum of its proper divisors (128667).

385989 is a wasteful number, since it uses less digits than its factorization.

385989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128666.

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

The square root of 385989 is about 621.2801300541. The cubic root of 385989 is about 72.8101025508.

The spelling of 385989 in words is "three hundred eighty-five thousand, nine hundred eighty-nine".