3963805 has 8 divisors (see below), whose sum is σ = 5036472. Its totient is φ = 2984448.

The previous prime is 3963803. The next prime is 3963809. The reversal of 3963805 is 5083693.

It can be written as a sum of positive squares in 4 ways, for example, as 436921 + 3526884 = 661^2 + 1878^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3963805 - 2¹ = 3963803 is a prime.

It is a Duffinian number.

3963805 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3963803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23232 + ... + 23401.

It is an arithmetic number, because the mean of its divisors is an integer number (629559).

Almost surely, 2^3963805 is an apocalyptic number.

It is an amenable number.

3963805 is a deficient number, since it is larger than the sum of its proper divisors (1072667).

3963805 is a wasteful number, since it uses less digits than its factorization.

3963805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46655.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 3963805 is about 1990.9306868899. The cubic root of 3963805 is about 158.2598538704.

The spelling of 3963805 in words is "three million, nine hundred sixty-three thousand, eight hundred five".