505571028 has 24 divisors (see below), whose sum is σ = 1201925088. Its totient is φ = 165343776.

The previous prime is 505571023. The next prime is 505571029. The reversal of 505571028 is 820175505.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 505571028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505571023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396826 + ... + 398097.

It is an arithmetic number, because the mean of its divisors is an integer number (50080212).

Almost surely, 2^505571028 is an apocalyptic number.

It is an amenable number.

505571028 is an abundant number, since it is smaller than the sum of its proper divisors (696354060).

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

505571028 is a wasteful number, since it uses less digits than its factorization.

505571028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794983 (or 794981 counting only the distinct ones).

The product of its (nonzero) digits is 14000, while the sum is 33.

The square root of 505571028 is about 22484.9066709204. The cubic root of 505571028 is about 796.6374635709.

The spelling of 505571028 in words is "five hundred five million, five hundred seventy-one thousand, twenty-eight".