505560128 has 28 divisors (see below), whose sum is σ = 1004034060. Its totient is φ = 252575232.

The previous prime is 505560109. The next prime is 505560137. The reversal of 505560128 is 821065505.

It can be written as a sum of positive squares in 2 ways, for example, as 174028864 + 331531264 = 13192^2 + 18208^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 505560094 and 505560103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104450 + ... + 109182.

Almost surely, 2^505560128 is an apocalyptic number.

It is an amenable number.

505560128 is a deficient number, since it is larger than the sum of its proper divisors (498473932).

505560128 is a wasteful number, since it uses less digits than its factorization.

505560128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6414 (or 6404 counting only the distinct ones).

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

The square root of 505560128 is about 22484.6642847964. The cubic root of 505560128 is about 796.6317384203.

The spelling of 505560128 in words is "five hundred five million, five hundred sixty thousand, one hundred twenty-eight".