3995990 has 16 divisors (see below), whose sum is σ = 7360848. Its totient is φ = 1561056.

The previous prime is 3995989. The next prime is 3996007. The reversal of 3995990 is 995993.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4217 + ... + 5076.

It is an arithmetic number, because the mean of its divisors is an integer number (460053).

Almost surely, 2^3995990 is an apocalyptic number.

3995990 is a deficient number, since it is larger than the sum of its proper divisors (3364858).

3995990 is a wasteful number, since it uses less digits than its factorization.

3995990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9343.

The product of its (nonzero) digits is 98415, while the sum is 44.

The square root of 3995990 is about 1998.9972486224. The cubic root of 3995990 is about 158.6870418090.

The spelling of 3995990 in words is "three million, nine hundred ninety-five thousand, nine hundred ninety".