57818 has 4 divisors (see below), whose sum is σ = 86730. Its totient is φ = 28908.

The previous prime is 57809. The next prime is 57829. The reversal of 57818 is 81875.

It is a happy number.

57818 is nontrivially palindromic in base 5.

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., 29929 + 27889 = 173^2 + 167^2 .

It is a super-2 number, since 2×57818² = 6685842248, which contains 22 as substring.

It is a Curzon number.

It is a zygodrome in base 5.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14453 + ... + 14456.

2⁵⁷⁸¹⁸ is an apocalyptic number.

57818 is a deficient number, since it is larger than the sum of its proper divisors (28912).

57818 is a wasteful number, since it uses less digits than its factorization.

57818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28911.

The product of its digits is 2240, while the sum is 29.

The square root of 57818 is about 240.4537377543. The cubic root of 57818 is about 38.6682355025.

It can be divided in two parts, 578 and 18, that multiplied together give a square (10404 = 102²).

The spelling of 57818 in words is "fifty-seven thousand, eight hundred eighteen".