385000389 has 6 divisors (see below), whose sum is σ = 556111686. Its totient is φ = 256666920.

The previous prime is 385000387. The next prime is 385000423. The reversal of 385000389 is 983000583.

It can be written as a sum of positive squares in only one way, i.e., 379080900 + 5919489 = 19470^2 + 2433^2 .

It is not a de Polignac number, because 385000389 - 2¹ = 385000387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385000387) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21388902 + ... + 21388919.

It is an arithmetic number, because the mean of its divisors is an integer number (92685281).

Almost surely, 2^385000389 is an apocalyptic number.

It is an amenable number.

385000389 is a deficient number, since it is larger than the sum of its proper divisors (171111297).

385000389 is a wasteful number, since it uses less digits than its factorization.

385000389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42777827 (or 42777824 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 385000389 is about 19621.4267829840. The cubic root of 385000389 is about 727.4788798913.

The spelling of 385000389 in words is "three hundred eighty-five million, three hundred eighty-nine", and thus it is an aban number.