557086 has 4 divisors (see below), whose sum is σ = 835632. Its totient is φ = 278542.

The previous prime is 557069. The next prime is 557087. The reversal of 557086 is 680755.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×557086² = 620689622792, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139270 + ... + 139273.

It is an arithmetic number, because the mean of its divisors is an integer number (208908).

2⁵⁵⁷⁰⁸⁶ is an apocalyptic number.

557086 is a deficient number, since it is larger than the sum of its proper divisors (278546).

557086 is a wasteful number, since it uses less digits than its factorization.

557086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278545.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 557086 is about 746.3819397601. The cubic root of 557086 is about 82.2824879435.

The spelling of 557086 in words is "five hundred fifty-seven thousand, eighty-six".