505128372 has 96 divisors (see below), whose sum is σ = 1389975552. Its totient is φ = 139790976.

The previous prime is 505128367. The next prime is 505128413. The reversal of 505128372 is 273821505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 368833 + ... + 370199.

It is an arithmetic number, because the mean of its divisors is an integer number (14478912).

Almost surely, 2^505128372 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 505128372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (694987776).

505128372 is an abundant number, since it is smaller than the sum of its proper divisors (884847180).

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

505128372 is a wasteful number, since it uses less digits than its factorization.

505128372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517 (or 1515 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 505128372 is about 22475.0611122640. The cubic root of 505128372 is about 796.4048953122.

Adding to 505128372 its reverse (273821505), we get a palindrome (778949877).

The spelling of 505128372 in words is "five hundred five million, one hundred twenty-eight thousand, three hundred seventy-two".