384857 has 8 divisors (see below), whose sum is σ = 427680. Its totient is φ = 343360.

The previous prime is 384851. The next prime is 384889. The reversal of 384857 is 758483.

384857 is nontrivially palindromic in base 8.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 384857 - 2⁴ = 384841 is a prime.

It is a super-2 number, since 2×384857² = 296229820898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (384851) 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 7 ways as a sum of consecutive naturals, for example, 353 + ... + 945.

It is an arithmetic number, because the mean of its divisors is an integer number (53460).

2³⁸⁴⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

384857 is a deficient number, since it is larger than the sum of its proper divisors (42823).

384857 is a wasteful number, since it uses less digits than its factorization.

384857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663.

The product of its digits is 26880, while the sum is 35.

The square root of 384857 is about 620.3684389135. The cubic root of 384857 is about 72.7388554942.

The spelling of 384857 in words is "three hundred eighty-four thousand, eight hundred fifty-seven".