505136808 has 96 divisors (see below), whose sum is σ = 1498629600. Its totient is φ = 152438400.

The previous prime is 505136789. The next prime is 505136809. The reversal of 505136808 is 808631505.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (505136809) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 211863 + ... + 214233.

It is an arithmetic number, because the mean of its divisors is an integer number (15610725).

Almost surely, 2^505136808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 505136808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (749314800).

505136808 is an abundant number, since it is smaller than the sum of its proper divisors (993492792).

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

505136808 is a wasteful number, since it uses less digits than its factorization.

505136808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2663 (or 2656 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 505136808 is about 22475.2487861647. The cubic root of 505136808 is about 796.4093287953.

The spelling of 505136808 in words is "five hundred five million, one hundred thirty-six thousand, eight hundred eight".