3408391 has 16 divisors (see below), whose sum is σ = 4192000. Its totient is φ = 2762424.

The previous prime is 3408389. The next prime is 3408407. The reversal of 3408391 is 1938043.

It is not a de Polignac number, because 3408391 - 2¹ = 3408389 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 (3408311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6256 + ... + 6778.

It is an arithmetic number, because the mean of its divisors is an integer number (262000).

Almost surely, 2^3408391 is an apocalyptic number.

3408391 is a deficient number, since it is larger than the sum of its proper divisors (783609).

3408391 is an equidigital number, since it uses as much as digits as its factorization.

3408391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563 (or 549 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 3408391 is about 1846.1828186829. The cubic root of 3408391 is about 150.4930589912.

It can be divided in two parts, 3408 and 391, that multiplied together give a triangular number (1332528 = T₁₆₃₂).

The spelling of 3408391 in words is "three million, four hundred eight thousand, three hundred ninety-one".