385585866 has 16 divisors (see below), whose sum is σ = 856857600. Its totient is φ = 128528604.

The previous prime is 385585847. The next prime is 385585873. The reversal of 385585866 is 668585583.

385585866 is a `hidden beast` number, since 3 + 8 + 5 + 58 + 586 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 7140479 = 385585866 / (3 + 8 + 5 + 5 + 8 + 5 + 8 + 6 + 6).

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3570186 + ... + 3570293.

It is an arithmetic number, because the mean of its divisors is an integer number (53553600).

Almost surely, 2^385585866 is an apocalyptic number.

385585866 is an abundant number, since it is smaller than the sum of its proper divisors (471271734).

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

385585866 is a wasteful number, since it uses less digits than its factorization.

385585866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7140490 (or 7140484 counting only the distinct ones).

The product of its digits is 6912000, while the sum is 54.

The square root of 385585866 is about 19636.3404431681. The cubic root of 385585866 is about 727.8474565163.

The spelling of 385585866 in words is "three hundred eighty-five million, five hundred eighty-five thousand, eight hundred sixty-six".