386857 has 4 divisors (see below), whose sum is σ = 395136. Its totient is φ = 378580.

The previous prime is 386851. The next prime is 386887. The reversal of 386857 is 758683.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 758683 = 193 ⋅3931.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-386857 is a prime.

It is a Duffinian number.

386857 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (386851) 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 in 3 ways as a sum of consecutive naturals, for example, 4069 + ... + 4162.

It is an arithmetic number, because the mean of its divisors is an integer number (98784).

386857 is a Friedman number, since it can be written as 5^8-3768, using all its digits and the basic arithmetic operations.

2³⁸⁶⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

386857 is a deficient number, since it is larger than the sum of its proper divisors (8279).

386857 is an equidigital number, since it uses as much as digits as its factorization.

386857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8278.

The product of its digits is 40320, while the sum is 37.

The square root of 386857 is about 621.9782954412. The cubic root of 386857 is about 72.8646393853.

The spelling of 386857 in words is "three hundred eighty-six thousand, eight hundred fifty-seven".