2005406343 has 48 divisors (see below), whose sum is σ = 3192134400. Its totient is φ = 1253771136.

The previous prime is 2005406329. The next prime is 2005406353. The reversal of 2005406343 is 3436045002.

2005406343 is a `hidden beast` number, since 20 + 0 + 5 + 4 + 0 + 634 + 3 = 666.

It is not a de Polignac number, because 2005406343 - 2¹² = 2005402247 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005406323) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1432758 + ... + 1434156.

It is an arithmetic number, because the mean of its divisors is an integer number (66502800).

Almost surely, 2^2005406343 is an apocalyptic number.

2005406343 is a deficient number, since it is larger than the sum of its proper divisors (1186728057).

2005406343 is a wasteful number, since it uses less digits than its factorization.

2005406343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1778 (or 1766 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 2005406343 is about 44781.7635092679. The cubic root of 2005406343 is about 1261.0552893848.

The spelling of 2005406343 in words is "two billion, five million, four hundred six thousand, three hundred forty-three".