3904085 has 4 divisors (see below), whose sum is σ = 4684908. Its totient is φ = 3123264.

The previous prime is 3904081. The next prime is 3904111. The reversal of 3904085 is 5804093.

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 966289 + 2937796 = 983^2 + 1714^2 .

It is a cyclic number.

It is not a de Polignac number, because 3904085 - 2² = 3904081 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3904081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390404 + ... + 390413.

It is an arithmetic number, because the mean of its divisors is an integer number (1171227).

Almost surely, 2^3904085 is an apocalyptic number.

It is an amenable number.

3904085 is a deficient number, since it is larger than the sum of its proper divisors (780823).

3904085 is an equidigital number, since it uses as much as digits as its factorization.

3904085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780822.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 3904085 is about 1975.8757552032. The cubic root of 3904085 is about 157.4610300831.

The spelling of 3904085 in words is "three million, nine hundred four thousand, eighty-five".