4085890 has 16 divisors (see below), whose sum is σ = 7413120. Its totient is φ = 1621360.

The previous prime is 4085857. The next prime is 4085891. The reversal of 4085890 is 985804.

It is not an unprimeable number, because it can be changed into a prime (4085891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250 + ... + 2869.

It is an arithmetic number, because the mean of its divisors is an integer number (463320).

Almost surely, 2^4085890 is an apocalyptic number.

4085890 is a deficient number, since it is larger than the sum of its proper divisors (3327230).

4085890 is a wasteful number, since it uses less digits than its factorization.

4085890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3257.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 4085890 is about 2021.3584541095. The cubic root of 4085890 is about 159.8682509184.

The spelling of 4085890 in words is "four million, eighty-five thousand, eight hundred ninety".