2005438 has 4 divisors (see below), whose sum is σ = 3008160. Its totient is φ = 1002718.

The previous prime is 2005429. The next prime is 2005441. The reversal of 2005438 is 8345002.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501358 + ... + 501361.

It is an arithmetic number, because the mean of its divisors is an integer number (752040).

2^2005438 is an apocalyptic number.

2005438 is a deficient number, since it is larger than the sum of its proper divisors (1002722).

2005438 is a wasteful number, since it uses less digits than its factorization.

2005438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002721.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 2005438 is about 1416.1348805816. The cubic root of 2005438 is about 126.1061924951.

The spelling of 2005438 in words is "two million, five thousand, four hundred thirty-eight".