3404405 has 4 divisors (see below), whose sum is σ = 4085292. Its totient is φ = 2723520.

The previous prime is 3404399. The next prime is 3404431. The reversal of 3404405 is 5044043.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5044043 = 491 ⋅10273.

It can be written as a sum of positive squares in 2 ways, for example, as 2669956 + 734449 = 1634^2 + 857^2 .

It is not a de Polignac number, because 3404405 - 2⁶ = 3404341 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340436 + ... + 340445.

It is an arithmetic number, because the mean of its divisors is an integer number (1021323).

Almost surely, 2^3404405 is an apocalyptic number.

It is an amenable number.

3404405 is a deficient number, since it is larger than the sum of its proper divisors (680887).

3404405 is an equidigital number, since it uses as much as digits as its factorization.

3404405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680886.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 3404405 is about 1845.1029781560. The cubic root of 3404405 is about 150.4343705636.

Adding to 3404405 its reverse (5044043), we get a palindrome (8448448).

The spelling of 3404405 in words is "three million, four hundred four thousand, four hundred five".