2005731406 has 24 divisors (see below), whose sum is σ = 3501426096. Its totient is φ = 859199040.

The previous prime is 2005731361. The next prime is 2005731419. The reversal of 2005731406 is 6041375002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 317430 + ... + 323686.

It is an arithmetic number, because the mean of its divisors is an integer number (145892754).

Almost surely, 2^2005731406 is an apocalyptic number.

2005731406 is a deficient number, since it is larger than the sum of its proper divisors (1495694690).

2005731406 is a wasteful number, since it uses less digits than its factorization.

2005731406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9544 (or 9537 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 2005731406 is about 44785.3927748769. The cubic root of 2005731406 is about 1261.1234219224.

The spelling of 2005731406 in words is "two billion, five million, seven hundred thirty-one thousand, four hundred six".