385289685 has 24 divisors (see below), whose sum is σ = 728548704. Its totient is φ = 186806880.

The previous prime is 385289651. The next prime is 385289687. The reversal of 385289685 is 586982583.

385289685 is a `hidden beast` number, since 38 + 528 + 9 + 6 + 85 = 666.

It is not a de Polignac number, because 385289685 - 2¹⁰ = 385288661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385289687) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 388687 + ... + 389676.

It is an arithmetic number, because the mean of its divisors is an integer number (30356196).

Almost surely, 2^385289685 is an apocalyptic number.

It is an amenable number.

385289685 is a deficient number, since it is larger than the sum of its proper divisors (343259019).

385289685 is a wasteful number, since it uses less digits than its factorization.

385289685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778385 (or 778382 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 54.

The square root of 385289685 is about 19628.7973396232. The cubic root of 385289685 is about 727.6610477059.

The spelling of 385289685 in words is "three hundred eighty-five million, two hundred eighty-nine thousand, six hundred eighty-five".