381659785 has 16 divisors (see below), whose sum is σ = 493733520. Its totient is φ = 281548800.

The previous prime is 381659779. The next prime is 381659819. The reversal of 381659785 is 587956183.

It can be written as a sum of positive squares in 8 ways, for example, as 99520576 + 282139209 = 9976^2 + 16797^2 .

It is not a de Polignac number, because 381659785 - 2⁵ = 381659753 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 75621 + ... + 80509.

It is an arithmetic number, because the mean of its divisors is an integer number (30858345).

Almost surely, 2^381659785 is an apocalyptic number.

It is an amenable number.

381659785 is a deficient number, since it is larger than the sum of its proper divisors (112073735).

381659785 is a wasteful number, since it uses less digits than its factorization.

381659785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6108.

The product of its digits is 1814400, while the sum is 52.

The square root of 381659785 is about 19536.1148901208. The cubic root of 381659785 is about 725.3686812912.

The spelling of 381659785 in words is "three hundred eighty-one million, six hundred fifty-nine thousand, seven hundred eighty-five".