3808405 has 4 divisors (see below), whose sum is σ = 4570092. Its totient is φ = 3046720.

The previous prime is 3808403. The next prime is 3808411. The reversal of 3808405 is 5048083.

3808405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2604996 + 1203409 = 1614^2 + 1097^2 .

It is not a de Polignac number, because 3808405 - 2¹ = 3808403 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 (3808403) 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 3 ways as a sum of consecutive naturals, for example, 380836 + ... + 380845.

It is an arithmetic number, because the mean of its divisors is an integer number (1142523).

Almost surely, 2^3808405 is an apocalyptic number.

It is an amenable number.

3808405 is a deficient number, since it is larger than the sum of its proper divisors (761687).

3808405 is an equidigital number, since it uses as much as digits as its factorization.

3808405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761686.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 3808405 is about 1951.5135151979. The cubic root of 3808405 is about 156.1640423208.

The spelling of 3808405 in words is "three million, eight hundred eight thousand, four hundred five".