394050505 has 16 divisors (see below), whose sum is σ = 479183040. Its totient is φ = 311049792.

The previous prime is 394050493. The next prime is 394050509. The reversal of 394050505 is 505050493.

It is a cyclic number.

It is not a de Polignac number, because 394050505 - 2⁵ = 394050473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (394050509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146866 + ... + 149524.

It is an arithmetic number, because the mean of its divisors is an integer number (29948940).

Almost surely, 2^394050505 is an apocalyptic number.

It is an amenable number.

394050505 is a deficient number, since it is larger than the sum of its proper divisors (85132535).

394050505 is a wasteful number, since it uses less digits than its factorization.

394050505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3048.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 394050505 is about 19850.7054030833. The cubic root of 394050505 is about 733.1350160474.

It can be divided in two parts, 3940 and 50505, that added together give a palindrome (54445).

The spelling of 394050505 in words is "three hundred ninety-four million, fifty thousand, five hundred five".