505218836 has 12 divisors (see below), whose sum is σ = 898627380. Its totient is φ = 248468160.

The previous prime is 505218781. The next prime is 505218859. The reversal of 505218836 is 638812505.

It can be written as a sum of positive squares in 2 ways, for example, as 49140100 + 456078736 = 7010^2 + 21356^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 505218836.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1035041 + ... + 1035528.

It is an arithmetic number, because the mean of its divisors is an integer number (74885615).

Almost surely, 2^505218836 is an apocalyptic number.

It is an amenable number.

505218836 is a deficient number, since it is larger than the sum of its proper divisors (393408544).

505218836 is a wasteful number, since it uses less digits than its factorization.

505218836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2070634 (or 2070632 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 505218836 is about 22477.0735639674. The cubic root of 505218836 is about 796.4524354861.

The spelling of 505218836 in words is "five hundred five million, two hundred eighteen thousand, eight hundred thirty-six".