385438665 has 16 divisors (see below), whose sum is σ = 616968000. Its totient is φ = 205478592.

The previous prime is 385438649. The next prime is 385438667. The reversal of 385438665 is 566834583.

It is not a de Polignac number, because 385438665 - 2⁴ = 385438649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (385438667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45591 + ... + 53379.

It is an arithmetic number, because the mean of its divisors is an integer number (38560500).

Almost surely, 2^385438665 is an apocalyptic number.

It is an amenable number.

385438665 is a deficient number, since it is larger than the sum of its proper divisors (231529335).

385438665 is a wasteful number, since it uses less digits than its factorization.

385438665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11096.

The product of its digits is 2073600, while the sum is 48.

The square root of 385438665 is about 19632.5919073361. The cubic root of 385438665 is about 727.7548238762.

The spelling of 385438665 in words is "three hundred eighty-five million, four hundred thirty-eight thousand, six hundred sixty-five".