385691688 has 48 divisors (see below), whose sum is σ = 1045879380. Its totient is φ = 128404224.

The previous prime is 385691687. The next prime is 385691707. The reversal of 385691688 is 886196583.

It can be written as a sum of positive squares in 2 ways, for example, as 364733604 + 20958084 = 19098^2 + 4578^2 .

It is not an unprimeable number, because it can be changed into a prime (385691687) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64606 + ... + 70322.

Almost surely, 2^385691688 is an apocalyptic number.

It is an amenable number.

385691688 is an abundant number, since it is smaller than the sum of its proper divisors (660187692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

385691688 is a wasteful number, since it uses less digits than its factorization.

385691688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6666 (or 6659 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The square root of 385691688 is about 19639.0348031669. The cubic root of 385691688 is about 727.9140350532.

The spelling of 385691688 in words is "three hundred eighty-five million, six hundred ninety-one thousand, six hundred eighty-eight".