3857315985 has 40 divisors (see below), whose sum is σ = 7009370280. Its totient is φ = 2029038336.

The previous prime is 3857315941. The next prime is 3857315999. The reversal of 3857315985 is 5895137583.

3857315985 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 531256401 + 3326059584 = 23049^2 + 57672^2 .

It is not a de Polignac number, because 3857315985 - 2¹⁰ = 3857314961 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 35670 + ... + 94799.

It is an arithmetic number, because the mean of its divisors is an integer number (175234257).

Almost surely, 2^3857315985 is an apocalyptic number.

It is an amenable number.

3857315985 is a deficient number, since it is larger than the sum of its proper divisors (3152054295).

3857315985 is a wasteful number, since it uses less digits than its factorization.

3857315985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130559 (or 130550 counting only the distinct ones).

The product of its digits is 4536000, while the sum is 54.

The square root of 3857315985 is about 62107.2941368403. The cubic root of 3857315985 is about 1568.2973393640.

The spelling of 3857315985 in words is "three billion, eight hundred fifty-seven million, three hundred fifteen thousand, nine hundred eighty-five".