505630 has 16 divisors (see below), whose sum is σ = 926640. Its totient is φ = 198592.

The previous prime is 505619. The next prime is 505633. The reversal of 505630 is 36505.

505630 = 316² + 317² + ... + 320².

505630 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 505598 and 505607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162 + ... + 1018.

It is an arithmetic number, because the mean of its divisors is an integer number (57915).

2⁵⁰⁵⁶³⁰ is an apocalyptic number.

505630 is a deficient number, since it is larger than the sum of its proper divisors (421010).

505630 is a wasteful number, since it uses less digits than its factorization.

505630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 505630 is about 711.0766484705. The cubic root of 505630 is about 79.6668436784. Note that the first 3 decimals are identical.

The spelling of 505630 in words is "five hundred five thousand, six hundred thirty".