385757665 has 32 divisors (see below), whose sum is σ = 496742400. Its totient is φ = 286752960.

The previous prime is 385757663. The next prime is 385757677. The reversal of 385757665 is 566757583.

It is not a de Polignac number, because 385757665 - 2¹ = 385757663 is a prime.

It is a super-2 number, since 2×385757665² = 297617952212504450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (385757663) 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 31 ways as a sum of consecutive naturals, for example, 1729744 + ... + 1729966.

It is an arithmetic number, because the mean of its divisors is an integer number (15523200).

Almost surely, 2^385757665 is an apocalyptic number.

It is an amenable number.

385757665 is a deficient number, since it is larger than the sum of its proper divisors (110984735).

385757665 is a wasteful number, since it uses less digits than its factorization.

385757665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517.

The product of its digits is 5292000, while the sum is 52.

The square root of 385757665 is about 19640.7144727477. The cubic root of 385757665 is about 727.9555387098.

The spelling of 385757665 in words is "three hundred eighty-five million, seven hundred fifty-seven thousand, six hundred sixty-five".