385984385 has 4 divisors (see below), whose sum is σ = 463181268. Its totient is φ = 308787504.

The previous prime is 385984381. The next prime is 385984433. The reversal of 385984385 is 583489583.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 174689089 + 211295296 = 13217^2 + 14536^2 .

It is a cyclic number.

It is not a de Polignac number, because 385984385 - 2² = 385984381 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385984381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38598434 + ... + 38598443.

It is an arithmetic number, because the mean of its divisors is an integer number (115795317).

Almost surely, 2^385984385 is an apocalyptic number.

It is an amenable number.

385984385 is a deficient number, since it is larger than the sum of its proper divisors (77196883).

385984385 is an equidigital number, since it uses as much as digits as its factorization.

385984385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77196882.

The product of its digits is 4147200, while the sum is 53.

The square root of 385984385 is about 19646.4853090826. The cubic root of 385984385 is about 728.0981236987.

The spelling of 385984385 in words is "three hundred eighty-five million, nine hundred eighty-four thousand, three hundred eighty-five".