385355566 has 16 divisors (see below), whose sum is σ = 581800320. Its totient is φ = 191426560.

The previous prime is 385355533. The next prime is 385355591. The reversal of 385355566 is 665553583.

385355566 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267075 + ... + 268513.

It is an arithmetic number, because the mean of its divisors is an integer number (36362520).

Almost surely, 2^385355566 is an apocalyptic number.

385355566 is a deficient number, since it is larger than the sum of its proper divisors (196444754).

385355566 is a wasteful number, since it uses less digits than its factorization.

385355566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2219.

The product of its digits is 1620000, while the sum is 46.

The square root of 385355566 is about 19630.4754399887. The cubic root of 385355566 is about 727.7025197958.

The spelling of 385355566 in words is "three hundred eighty-five million, three hundred fifty-five thousand, five hundred sixty-six".