505128926 has 16 divisors (see below), whose sum is σ = 765642240. Its totient is φ = 249926040.

The previous prime is 505128893. The next prime is 505128947. The reversal of 505128926 is 629821505.

It is a self number, because there is not a number n which added to its sum of digits gives 505128926.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96755 + ... + 101841.

It is an arithmetic number, because the mean of its divisors is an integer number (47852640).

Almost surely, 2^505128926 is an apocalyptic number.

505128926 is a deficient number, since it is larger than the sum of its proper divisors (260513314).

505128926 is a wasteful number, since it uses less digits than its factorization.

505128926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5599.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 505128926 is about 22475.0734370324. The cubic root of 505128926 is about 796.4051864647.

The spelling of 505128926 in words is "five hundred five million, one hundred twenty-eight thousand, nine hundred twenty-six".