557690 has 32 divisors (see below), whose sum is σ = 1188864. Its totient is φ = 184320.

The previous prime is 557671. The next prime is 557693. The reversal of 557690 is 96755.

It is a super-2 number, since 2×557690² = 622036272200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (557693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2042 + ... + 2298.

It is an arithmetic number, because the mean of its divisors is an integer number (37152).

2⁵⁵⁷⁶⁹⁰ is an apocalyptic number.

557690 is an abundant number, since it is smaller than the sum of its proper divisors (631174).

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

557690 is a wasteful number, since it uses less digits than its factorization.

557690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 557690 is about 746.7864487255. The cubic root of 557690 is about 82.3122144562.

The spelling of 557690 in words is "five hundred fifty-seven thousand, six hundred ninety".