557420 has 24 divisors (see below), whose sum is σ = 1197504. Its totient is φ = 217856.

The previous prime is 557377. The next prime is 557423. The reversal of 557420 is 24755.

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

557420 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, 644 + ... + 1236.

It is an arithmetic number, because the mean of its divisors is an integer number (49896).

2⁵⁵⁷⁴²⁰ is an apocalyptic number.

It is an amenable number.

557420 is an abundant number, since it is smaller than the sum of its proper divisors (640084).

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

557420 is a wasteful number, since it uses less digits than its factorization.

557420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649 (or 647 counting only the distinct ones).

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

The square root of 557420 is about 746.6056522690. The cubic root of 557420 is about 82.2989287686.

The spelling of 557420 in words is "five hundred fifty-seven thousand, four hundred twenty".