2005408742 has 4 divisors (see below), whose sum is σ = 3008113116. Its totient is φ = 1002704370.

The previous prime is 2005408729. The next prime is 2005408747. The reversal of 2005408742 is 2478045002.

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

It is a junction number, because it is equal to n+sod(n) for n = 2005408699 and 2005408708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005408747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501352184 + ... + 501352187.

It is an arithmetic number, because the mean of its divisors is an integer number (752028279).

Almost surely, 2^2005408742 is an apocalyptic number.

2005408742 is a deficient number, since it is larger than the sum of its proper divisors (1002704374).

2005408742 is a wasteful number, since it uses less digits than its factorization.

2005408742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002704373.

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 2005408742 is about 44781.7902947169. The cubic root of 2005408742 is about 1261.0557922372.

The spelling of 2005408742 in words is "two billion, five million, four hundred eight thousand, seven hundred forty-two".