505604020 has 12 divisors (see below), whose sum is σ = 1061768484. Its totient is φ = 202241600.

The previous prime is 505603999. The next prime is 505604027. The reversal of 505604020 is 20406505.

It can be written as a sum of positive squares in 2 ways, for example, as 139570596 + 366033424 = 11814^2 + 19132^2 .

It is a junction number, because it is equal to n+sod(n) for n = 505603982 and 505604000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505604027) 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, 12640081 + ... + 12640120.

It is an arithmetic number, because the mean of its divisors is an integer number (88480707).

Almost surely, 2^505604020 is an apocalyptic number.

It is an amenable number.

505604020 is an abundant number, since it is smaller than the sum of its proper divisors (556164464).

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

505604020 is a wasteful number, since it uses less digits than its factorization.

505604020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25280210 (or 25280208 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 505604020 is about 22485.6403066490. The cubic root of 505604020 is about 796.6547918921.

The spelling of 505604020 in words is "five hundred five million, six hundred four thousand, twenty".