57286 has 4 divisors (see below), whose sum is σ = 85932. Its totient is φ = 28642.

The previous prime is 57283. The next prime is 57287. The reversal of 57286 is 68275.

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

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14320 + ... + 14323.

It is an arithmetic number, because the mean of its divisors is an integer number (21483).

2⁵⁷²⁸⁶ is an apocalyptic number.

57286 is a deficient number, since it is larger than the sum of its proper divisors (28646).

57286 is a wasteful number, since it uses less digits than its factorization.

57286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28645.

The product of its digits is 3360, while the sum is 28.

The square root of 57286 is about 239.3449393658. The cubic root of 57286 is about 38.5492707016.

It can be divided in two parts, 57 and 286, that added together give a palindrome (343).

The spelling of 57286 in words is "fifty-seven thousand, two hundred eighty-six".