505724 has 18 divisors (see below), whose sum is σ = 929040. Its totient is φ = 240856.

The previous prime is 505711. The next prime is 505727. The reversal of 505724 is 427505.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 505724.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1997 + ... + 2235.

2⁵⁰⁵⁷²⁴ is an apocalyptic number.

It is an amenable number.

505724 is a deficient number, since it is larger than the sum of its proper divisors (423316).

505724 is a wasteful number, since it uses less digits than its factorization.

505724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 505724 is about 711.1427423521. The cubic root of 505724 is about 79.6717802389.

The spelling of 505724 in words is "five hundred five thousand, seven hundred twenty-four".