3990443 has 4 divisors (see below), whose sum is σ = 4083288. Its totient is φ = 3897600.

The previous prime is 3990419. The next prime is 3990449. The reversal of 3990443 is 3440993.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3990443 - 2⁶ = 3990379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3990449) 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, 46358 + ... + 46443.

It is an arithmetic number, because the mean of its divisors is an integer number (1020822).

Almost surely, 2^3990443 is an apocalyptic number.

3990443 is a deficient number, since it is larger than the sum of its proper divisors (92845).

3990443 is an equidigital number, since it uses as much as digits as its factorization.

3990443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92844.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 3990443 is about 1997.6093211637. The cubic root of 3990443 is about 158.6135811119.

The spelling of 3990443 in words is "three million, nine hundred ninety thousand, four hundred forty-three".