385715871 has 16 divisors (see below), whose sum is σ = 580801120. Its totient is φ = 252927360.

The previous prime is 385715849. The next prime is 385715879. The reversal of 385715871 is 178517583.

385715871 is a `hidden beast` number, since 3 + 8 + 571 + 5 + 8 + 71 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-385715871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385715879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115450 + ... + 118743.

It is an arithmetic number, because the mean of its divisors is an integer number (36300070).

Almost surely, 2^385715871 is an apocalyptic number.

385715871 is a deficient number, since it is larger than the sum of its proper divisors (195085249).

385715871 is a wasteful number, since it uses less digits than its factorization.

385715871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234263 (or 234257 counting only the distinct ones).

The product of its digits is 235200, while the sum is 45.

The square root of 385715871 is about 19639.6504805966. The cubic root of 385715871 is about 727.9292482211.

The spelling of 385715871 in words is "three hundred eighty-five million, seven hundred fifteen thousand, eight hundred seventy-one".