3995890 has 16 divisors (see below), whose sum is σ = 7571520. Its totient is φ = 1514160.

The previous prime is 3995851. The next prime is 3995891. The reversal of 3995890 is 985993.

It is not an unprimeable number, because it can be changed into a prime (3995891) 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, 10326 + ... + 10705.

It is an arithmetic number, because the mean of its divisors is an integer number (473220).

Almost surely, 2^3995890 is an apocalyptic number.

3995890 is a deficient number, since it is larger than the sum of its proper divisors (3575630).

3995890 is a wasteful number, since it uses less digits than its factorization.

3995890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21057.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 3995890 is about 1998.9722359253. The cubic root of 3995890 is about 158.6857180789.

The spelling of 3995890 in words is "three million, nine hundred ninety-five thousand, eight hundred ninety".