4005812 has 12 divisors (see below), whose sum is σ = 7422660. Its totient is φ = 1885056.

The previous prime is 4005791. The next prime is 4005817. The reversal of 4005812 is 2185004.

It can be written as a sum of positive squares in 2 ways, for example, as 1196836 + 2808976 = 1094^2 + 1676^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4005817) 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, 29387 + ... + 29522.

It is an arithmetic number, because the mean of its divisors is an integer number (618555).

Almost surely, 2^4005812 is an apocalyptic number.

It is an amenable number.

4005812 is a deficient number, since it is larger than the sum of its proper divisors (3416848).

4005812 is a wasteful number, since it uses less digits than its factorization.

4005812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58930 (or 58928 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 4005812 is about 2001.4524725809. The cubic root of 4005812 is about 158.8169511141.

The spelling of 4005812 in words is "four million, five thousand, eight hundred twelve".