385855018 has 32 divisors (see below), whose sum is σ = 644828688. Its totient is φ = 172339200.

The previous prime is 385855013. The next prime is 385855027. The reversal of 385855018 is 810558583.

It can be written as a sum of positive squares in 8 ways, for example, as 301821129 + 84033889 = 17373^2 + 9167^2 .

It is not an unprimeable number, because it can be changed into a prime (385855013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47838 + ... + 55318.

Almost surely, 2^385855018 is an apocalyptic number.

385855018 is a deficient number, since it is larger than the sum of its proper divisors (258973670).

385855018 is a wasteful number, since it uses less digits than its factorization.

385855018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7578.

The product of its (nonzero) digits is 192000, while the sum is 43.

The square root of 385855018 is about 19643.1926631085. The cubic root of 385855018 is about 728.0167711891.

The spelling of 385855018 in words is "three hundred eighty-five million, eight hundred fifty-five thousand, eighteen".