3885685 has 4 divisors (see below), whose sum is σ = 4662828. Its totient is φ = 3108544.

The previous prime is 3885677. The next prime is 3885691. The reversal of 3885685 is 5865883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5865883 = 571 ⋅10273.

It can be written as a sum of positive squares in 2 ways, for example, as 2579236 + 1306449 = 1606^2 + 1143^2 .

It is a cyclic number.

It is not a de Polignac number, because 3885685 - 2³ = 3885677 is a prime.

It is a Duffinian number.

3885685 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388564 + ... + 388573.

It is an arithmetic number, because the mean of its divisors is an integer number (1165707).

Almost surely, 2^3885685 is an apocalyptic number.

It is an amenable number.

3885685 is a deficient number, since it is larger than the sum of its proper divisors (777143).

3885685 is an equidigital number, since it uses as much as digits as its factorization.

3885685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777142.

The product of its digits is 230400, while the sum is 43.

The square root of 3885685 is about 1971.2140928879. The cubic root of 3885685 is about 157.2132685246.

The spelling of 3885685 in words is "three million, eight hundred eighty-five thousand, six hundred eighty-five".