3982805 has 4 divisors (see below), whose sum is σ = 4779372. Its totient is φ = 3186240.

The previous prime is 3982801. The next prime is 3982813. The reversal of 3982805 is 5082893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5082893 = 41 ⋅123973.

It can be written as a sum of positive squares in 2 ways, for example, as 2114116 + 1868689 = 1454^2 + 1367^2 .

It is not a de Polignac number, because 3982805 - 2² = 3982801 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3982801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398276 + ... + 398285.

It is an arithmetic number, because the mean of its divisors is an integer number (1194843).

Almost surely, 2^3982805 is an apocalyptic number.

It is an amenable number.

3982805 is a deficient number, since it is larger than the sum of its proper divisors (796567).

3982805 is an equidigital number, since it uses as much as digits as its factorization.

3982805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796566.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 3982805 is about 1995.6966202306. The cubic root of 3982805 is about 158.5123171406.

The spelling of 3982805 in words is "three million, nine hundred eighty-two thousand, eight hundred five".