385528565 has 4 divisors (see below), whose sum is σ = 462634284. Its totient is φ = 308422848.

The previous prime is 385528547. The next prime is 385528607. The reversal of 385528565 is 565825583.

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 158785201 + 226743364 = 12601^2 + 15058^2 .

It is a cyclic number.

It is not a de Polignac number, because 385528565 - 2²⁴ = 368751349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 38552852 + ... + 38552861.

It is an arithmetic number, because the mean of its divisors is an integer number (115658571).

Almost surely, 2^385528565 is an apocalyptic number.

It is an amenable number.

385528565 is a deficient number, since it is larger than the sum of its proper divisors (77105719).

385528565 is an equidigital number, since it uses as much as digits as its factorization.

385528565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77105718.

The product of its digits is 1440000, while the sum is 47.

The square root of 385528565 is about 19634.8813339933. The cubic root of 385528565 is about 727.8114001693.

The spelling of 385528565 in words is "three hundred eighty-five million, five hundred twenty-eight thousand, five hundred sixty-five".