3990920 has 32 divisors (see below), whose sum is σ = 9509400. Its totient is φ = 1502208.

The previous prime is 3990919. The next prime is 3990929. The reversal of 3990920 is 290993.

3990920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2896804 + 1094116 = 1702^2 + 1046^2 .

It is not an unprimeable number, because it can be changed into a prime (3990929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2255 + ... + 3614.

Almost surely, 2^3990920 is an apocalyptic number.

It is an amenable number.

3990920 is an abundant number, since it is smaller than the sum of its proper divisors (5518480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3990920 is a wasteful number, since it uses less digits than its factorization.

3990920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5897 (or 5893 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 3990920 is about 1997.7287103108. The cubic root of 3990920 is about 158.6199008500.

The spelling of 3990920 in words is "three million, nine hundred ninety thousand, nine hundred twenty".