394540005 has 32 divisors (see below), whose sum is σ = 638668800. Its totient is φ = 207970112.

The previous prime is 394540001. The next prime is 394540039. The reversal of 394540005 is 500045493.

It is a cyclic number.

It is not a de Polignac number, because 394540005 - 2² = 394540001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394540001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 598366 + ... + 599024.

It is an arithmetic number, because the mean of its divisors is an integer number (19958400).

Almost surely, 2^394540005 is an apocalyptic number.

It is an amenable number.

394540005 is a deficient number, since it is larger than the sum of its proper divisors (244128795).

394540005 is a wasteful number, since it uses less digits than its factorization.

394540005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 394540005 is about 19863.0311131005. The cubic root of 394540005 is about 733.4384636928.

Adding to 394540005 its reverse (500045493), we get a palindrome (894585498).

The spelling of 394540005 in words is "three hundred ninety-four million, five hundred forty thousand, five".