557724 has 12 divisors (see below), whose sum is σ = 1301384. Its totient is φ = 185904.

The previous prime is 557717. The next prime is 557729. The reversal of 557724 is 427755.

557724 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×557724² = 622112120352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 557691 and 557700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23227 + ... + 23250.

2⁵⁵⁷⁷²⁴ is an apocalyptic number.

It is an amenable number.

557724 is an abundant number, since it is smaller than the sum of its proper divisors (743660).

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

557724 is a wasteful number, since it uses less digits than its factorization.

557724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46484 (or 46482 counting only the distinct ones).

The product of its digits is 9800, while the sum is 30.

The square root of 557724 is about 746.8092125838. The cubic root of 557724 is about 82.3138871647.

The spelling of 557724 in words is "five hundred fifty-seven thousand, seven hundred twenty-four".