505391480 has 64 divisors (see below), whose sum is σ = 1244160000. Its totient is φ = 183237760.

The previous prime is 505391479. The next prime is 505391503. The reversal of 505391480 is 84193505.

It is a self number, because there is not a number n which added to its sum of digits gives 505391480.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167021 + ... + 170019.

It is an arithmetic number, because the mean of its divisors is an integer number (19440000).

Almost surely, 2^505391480 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 505391480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (622080000).

505391480 is an abundant number, since it is smaller than the sum of its proper divisors (738768520).

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

505391480 is a wasteful number, since it uses less digits than its factorization.

505391480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3404 (or 3400 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 505391480 is about 22480.9136824997. The cubic root of 505391480 is about 796.5431467218.

The spelling of 505391480 in words is "five hundred five million, three hundred ninety-one thousand, four hundred eighty".