2005404 has 12 divisors (see below), whose sum is σ = 4679304. Its totient is φ = 668464.

The previous prime is 2005397. The next prime is 2005417. The reversal of 2005404 is 4045002.

It is a tau number, because it is divible by the number of its divisors (12).

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, 83547 + ... + 83570.

It is an arithmetic number, because the mean of its divisors is an integer number (389942).

2^2005404 is an apocalyptic number.

It is an amenable number.

2005404 is an abundant number, since it is smaller than the sum of its proper divisors (2673900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2005404 is a wasteful number, since it uses less digits than its factorization.

2005404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167124 (or 167122 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 2005404 is about 1416.1228760245. The cubic root of 2005404 is about 126.1054798270.

The spelling of 2005404 in words is "two million, five thousand, four hundred four".