3406405 has 8 divisors (see below), whose sum is σ = 4198392. Its totient is φ = 2651328.

The previous prime is 3406391. The next prime is 3406421. The reversal of 3406405 is 5046043.

It can be written as a sum of positive squares in 4 ways, for example, as 580644 + 2825761 = 762^2 + 1681^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3406405 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9022 + ... + 9391.

It is an arithmetic number, because the mean of its divisors is an integer number (524799).

Almost surely, 2^3406405 is an apocalyptic number.

It is an amenable number.

3406405 is a deficient number, since it is larger than the sum of its proper divisors (791987).

3406405 is a wasteful number, since it uses less digits than its factorization.

3406405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18455.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 3406405 is about 1845.6448737501. The cubic root of 3406405 is about 150.4638235657.

The spelling of 3406405 in words is "three million, four hundred six thousand, four hundred five".