56818 has 4 divisors (see below), whose sum is σ = 85230. Its totient is φ = 28408.

The previous prime is 56813. The next prime is 56821. The reversal of 56818 is 81865.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 45369 + 11449 = 213^2 + 107^2 .

It is not an unprimeable number, because it can be changed into a prime (56813) by changing a digit.

56818 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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14203 + ... + 14206.

2⁵⁶⁸¹⁸ is an apocalyptic number.

56818 is a deficient number, since it is larger than the sum of its proper divisors (28412).

56818 is a wasteful number, since it uses less digits than its factorization.

56818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28411.

The product of its digits is 1920, while the sum is 28.

The square root of 56818 is about 238.3652659261. The cubic root of 56818 is about 38.4440069844. Note that the first 3 decimals are identical.

The spelling of 56818 in words is "fifty-six thousand, eight hundred eighteen".