505553028 has 12 divisors (see below), whose sum is σ = 1179623760. Its totient is φ = 168517672.

The previous prime is 505553017. The next prime is 505553029. The reversal of 505553028 is 820355505.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 505553028.

It is not an unprimeable number, because it can be changed into a prime (505553029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21064698 + ... + 21064721.

It is an arithmetic number, because the mean of its divisors is an integer number (98301980).

Almost surely, 2^505553028 is an apocalyptic number.

It is an amenable number.

505553028 is an abundant number, since it is smaller than the sum of its proper divisors (674070732).

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

505553028 is a wasteful number, since it uses less digits than its factorization.

505553028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42129426 (or 42129424 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 33.

The square root of 505553028 is about 22484.5063988516. The cubic root of 505553028 is about 796.6280091495.

The spelling of 505553028 in words is "five hundred five million, five hundred fifty-three thousand, twenty-eight".