505912320 has 132 divisors (see below), whose sum is σ = 1753132680. Its totient is φ = 134897664.

The previous prime is 505912313. The next prime is 505912321. The reversal of 505912320 is 23219505.

505912320 is a `hidden beast` number, since 50 + 591 + 2 + 3 + 20 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505912321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40591 + ... + 51569.

Almost surely, 2^505912320 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 505912320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (876566340).

505912320 is an abundant number, since it is smaller than the sum of its proper divisors (1247220360).

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

505912320 is a wasteful number, since it uses less digits than its factorization.

505912320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11010 (or 10989 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 505912320 is about 22492.4947482488. The cubic root of 505912320 is about 796.8166832526.

The spelling of 505912320 in words is "five hundred five million, nine hundred twelve thousand, three hundred twenty".