3806305 has 4 divisors (see below), whose sum is σ = 4567572. Its totient is φ = 3045040.

The previous prime is 3806303. The next prime is 3806321. The reversal of 3806305 is 5036083.

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 1934881 + 1871424 = 1391^2 + 1368^2 .

It is not a de Polignac number, because 3806305 - 2¹ = 3806303 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3806305.

It is not an unprimeable number, because it can be changed into a prime (3806303) 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, 380626 + ... + 380635.

It is an arithmetic number, because the mean of its divisors is an integer number (1141893).

Almost surely, 2^3806305 is an apocalyptic number.

It is an amenable number.

3806305 is a deficient number, since it is larger than the sum of its proper divisors (761267).

3806305 is an equidigital number, since it uses as much as digits as its factorization.

3806305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761266.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 3806305 is about 1950.9753970771. The cubic root of 3806305 is about 156.1353334707.

The spelling of 3806305 in words is "three million, eight hundred six thousand, three hundred five".