3905397 has 12 divisors (see below), whose sum is σ = 5664204. Its totient is φ = 2592960.

The previous prime is 3905383. The next prime is 3905413. The reversal of 3905397 is 7935093.

It can be written as a sum of positive squares in 2 ways, for example, as 2852721 + 1052676 = 1689^2 + 1026^2 .

It is not a de Polignac number, because 3905397 - 2¹² = 3901301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3905327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1897 + ... + 3377.

It is an arithmetic number, because the mean of its divisors is an integer number (472017).

Almost surely, 2^3905397 is an apocalyptic number.

It is an amenable number.

3905397 is a deficient number, since it is larger than the sum of its proper divisors (1758807).

3905397 is a wasteful number, since it uses less digits than its factorization.

3905397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780 (or 1777 counting only the distinct ones).

The product of its (nonzero) digits is 25515, while the sum is 36.

The square root of 3905397 is about 1976.2077319958. The cubic root of 3905397 is about 157.4786668007.

The spelling of 3905397 in words is "three million, nine hundred five thousand, three hundred ninety-seven".