505306394 has 8 divisors (see below), whose sum is σ = 764667540. Its totient is φ = 250417216.

The previous prime is 505306393. The next prime is 505306409. The reversal of 505306394 is 493603505.

It can be written as a sum of positive squares in 2 ways, for example, as 479040769 + 26265625 = 21887^2 + 5125^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (505306393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1117709 + ... + 1118160.

Almost surely, 2^505306394 is an apocalyptic number.

505306394 is a deficient number, since it is larger than the sum of its proper divisors (259361146).

505306394 is a wasteful number, since it uses less digits than its factorization.

505306394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2235984.

The product of its (nonzero) digits is 48600, while the sum is 35.

The square root of 505306394 is about 22479.0211975522. The cubic root of 505306394 is about 796.4984431097.

Adding to 505306394 its reverse (493603505), we get a palindrome (998909899).

The spelling of 505306394 in words is "five hundred five million, three hundred six thousand, three hundred ninety-four".