557730 has 24 divisors (see below), whose sum is σ = 1450332. Its totient is φ = 148704.

The previous prime is 557729. The next prime is 557731. The reversal of 557730 is 37755.

It is an interprime number because it is at equal distance from previous prime (557729) and next prime (557731).

It can be written as a sum of positive squares in 2 ways, for example, as 549081 + 8649 = 741^2 + 93^2 .

It is a super-2 number, since 2×557730² = 622125505800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 557694 and 557703.

It is not an unprimeable number, because it can be changed into a prime (557731) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3009 + ... + 3188.

2⁵⁵⁷⁷³⁰ is an apocalyptic number.

557730 is an abundant number, since it is smaller than the sum of its proper divisors (892602).

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

557730 is a wasteful number, since it uses less digits than its factorization.

557730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6210 (or 6207 counting only the distinct ones).

The product of its (nonzero) digits is 3675, while the sum is 27.

The square root of 557730 is about 746.8132296632. The cubic root of 557730 is about 82.3141823415.

The spelling of 557730 in words is "five hundred fifty-seven thousand, seven hundred thirty".