505518260 has 48 divisors (see below), whose sum is σ = 1151010000. Its totient is φ = 185385984.

The previous prime is 505518259. The next prime is 505518281. The reversal of 505518260 is 62815505.

It can be written as a sum of positive squares in 8 ways, for example, as 95374756 + 410143504 = 9766^2 + 20252^2 .

It is a super-2 number, since 2×505518260² = 511097422386855200, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 32216 + ... + 45264.

It is an arithmetic number, because the mean of its divisors is an integer number (23979375).

Almost surely, 2^505518260 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 505518260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (575505000).

505518260 is an abundant number, since it is smaller than the sum of its proper divisors (645491740).

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

505518260 is a wasteful number, since it uses less digits than its factorization.

505518260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13220 (or 13218 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 505518260 is about 22483.7332309383. The cubic root of 505518260 is about 796.6097467741.

The spelling of 505518260 in words is "five hundred five million, five hundred eighteen thousand, two hundred sixty".