3900305 has 4 divisors (see below), whose sum is σ = 4680372. Its totient is φ = 3120240.

The previous prime is 3900287. The next prime is 3900307. The reversal of 3900305 is 5030093.

3900305 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, and also an emirpimes, since its reverse is a distinct semiprime: 5030093 = 227 ⋅22159.

It can be written as a sum of positive squares in 2 ways, for example, as 410881 + 3489424 = 641^2 + 1868^2 .

It is not a de Polignac number, because 3900305 - 2¹⁴ = 3883921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3900307) 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, 390026 + ... + 390035.

It is an arithmetic number, because the mean of its divisors is an integer number (1170093).

Almost surely, 2^3900305 is an apocalyptic number.

It is an amenable number.

3900305 is a deficient number, since it is larger than the sum of its proper divisors (780067).

3900305 is an equidigital number, since it uses as much as digits as its factorization.

3900305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780066.

The product of its (nonzero) digits is 405, while the sum is 20.

The square root of 3900305 is about 1974.9189856802. The cubic root of 3900305 is about 157.4101948774.

Adding to 3900305 its reverse (5030093), we get a palindrome (8930398).

The spelling of 3900305 in words is "three million, nine hundred thousand, three hundred five".