505503394 has 24 divisors (see below), whose sum is σ = 836573724. Its totient is φ = 228914400.

The previous prime is 505503389. The next prime is 505503421. The reversal of 505503394 is 493305505.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 429028369 + 76475025 = 20713^2 + 8745^2 .

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, 63264 + ... + 70804.

Almost surely, 2^505503394 is an apocalyptic number.

505503394 is a deficient number, since it is larger than the sum of its proper divisors (331070330).

505503394 is a wasteful number, since it uses less digits than its factorization.

505503394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7842 (or 7831 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 34.

The square root of 505503394 is about 22483.4026339431. The cubic root of 505503394 is about 796.6019379454.

Adding to 505503394 its reverse (493305505), we get a palindrome (998808899).

The spelling of 505503394 in words is "five hundred five million, five hundred three thousand, three hundred ninety-four".