557428 has 24 divisors (see below), whose sum is σ = 1044288. Its totient is φ = 259776.

The previous prime is 557423. The next prime is 557443. The reversal of 557428 is 824755.

It is a self number, because there is not a number n which added to its sum of digits gives 557428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557423) by changing a digit.

557428 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 6675 + ... + 6757.

It is an arithmetic number, because the mean of its divisors is an integer number (43512).

2⁵⁵⁷⁴²⁸ is an apocalyptic number.

It is an amenable number.

557428 is a deficient number, since it is larger than the sum of its proper divisors (486860).

557428 is a wasteful number, since it uses less digits than its factorization.

557428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 181 counting only the distinct ones).

The product of its digits is 11200, while the sum is 31.

The square root of 557428 is about 746.6110098304. The cubic root of 557428 is about 82.2993224802.

The spelling of 557428 in words is "five hundred fifty-seven thousand, four hundred twenty-eight".