3905394405 has 32 divisors (see below), whose sum is σ = 6912718848. Its totient is φ = 1866849600.

The previous prime is 3905394403. The next prime is 3905394407. The reversal of 3905394405 is 5044935093.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3905394403) and next prime (3905394407).

It is not a de Polignac number, because 3905394405 - 2¹ = 3905394403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3905394403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154969 + ... + 178398.

It is an arithmetic number, because the mean of its divisors is an integer number (216022464).

Almost surely, 2^3905394405 is an apocalyptic number.

It is an amenable number.

3905394405 is a deficient number, since it is larger than the sum of its proper divisors (3007324443).

3905394405 is a wasteful number, since it uses less digits than its factorization.

3905394405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333457.

The product of its (nonzero) digits is 291600, while the sum is 42.

The square root of 3905394405 is about 62493.1548651530. The cubic root of 3905394405 is about 1574.7863192097.

The spelling of 3905394405 in words is "three billion, nine hundred five million, three hundred ninety-four thousand, four hundred five".