505811868 has 24 divisors (see below), whose sum is σ = 1180704000. Its totient is φ = 168535920.

The previous prime is 505811759. The next prime is 505811869. The reversal of 505811868 is 868118505.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505811869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29133 + ... + 43131.

It is an arithmetic number, because the mean of its divisors is an integer number (49196000).

Almost surely, 2^505811868 is an apocalyptic number.

It is an amenable number.

505811868 is an abundant number, since it is smaller than the sum of its proper divisors (674892132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

505811868 is a wasteful number, since it uses less digits than its factorization.

505811868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17017 (or 17015 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 42.

The square root of 505811868 is about 22490.2616258682. The cubic root of 505811868 is about 796.7639421454.

The spelling of 505811868 in words is "five hundred five million, eight hundred eleven thousand, eight hundred sixty-eight".