505913812 has 12 divisors (see below), whose sum is σ = 937428660. Its totient is φ = 238077056.

The previous prime is 505913783. The next prime is 505913857. The reversal of 505913812 is 218319505.

It can be written as a sum of positive squares in 2 ways, for example, as 459073476 + 46840336 = 21426^2 + 6844^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3719887 + ... + 3720022.

It is an arithmetic number, because the mean of its divisors is an integer number (78119055).

Almost surely, 2^505913812 is an apocalyptic number.

It is an amenable number.

505913812 is a deficient number, since it is larger than the sum of its proper divisors (431514848).

505913812 is a wasteful number, since it uses less digits than its factorization.

505913812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7439930 (or 7439928 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 505913812 is about 22492.5279148432. The cubic root of 505913812 is about 796.8174665565.

The spelling of 505913812 in words is "five hundred five million, nine hundred thirteen thousand, eight hundred twelve".