56287 has 16 divisors (see below), whose sum is σ = 76032. Its totient is φ = 40320.

The previous prime is 56269. The next prime is 56299. The reversal of 56287 is 78265.

It is a de Polignac number, because none of the positive numbers 2^k-56287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1288 + ... + 1330.

It is an arithmetic number, because the mean of its divisors is an integer number (4752).

2⁵⁶²⁸⁷ is an apocalyptic number.

56287 is the 119-th decagonal number.

56287 is a deficient number, since it is larger than the sum of its proper divisors (19745).

56287 is a wasteful number, since it uses less digits than its factorization.

56287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78.

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

The square root of 56287 is about 237.2488145387. The cubic root of 56287 is about 38.3238708003.

It can be divided in two parts, 56 and 287, that added together give a palindrome (343).

The spelling of 56287 in words is "fifty-six thousand, two hundred eighty-seven".