505684 has 6 divisors (see below), whose sum is σ = 884954. Its totient is φ = 252840.

The previous prime is 505669. The next prime is 505691. The reversal of 505684 is 486505.

It can be written as a sum of positive squares in only one way, i.e., 476100 + 29584 = 690^2 + 172^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63207 + ... + 63214.

2⁵⁰⁵⁶⁸⁴ is an apocalyptic number.

It is an amenable number.

505684 is a deficient number, since it is larger than the sum of its proper divisors (379270).

505684 is a wasteful number, since it uses less digits than its factorization.

505684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126425 (or 126423 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 505684 is about 711.1146180469. The cubic root of 505684 is about 79.6696796497.

The spelling of 505684 in words is "five hundred five thousand, six hundred eighty-four".