385819 has 4 divisors (see below), whose sum is σ = 440944. Its totient is φ = 330696.

The previous prime is 385817. The next prime is 385831. The reversal of 385819 is 918583.

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

It is a cyclic number.

It is not a de Polignac number, because 385819 - 2¹ = 385817 is a prime.

It is a super-2 number, since 2×385819² = 297712601522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (385811) 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, 27552 + ... + 27565.

It is an arithmetic number, because the mean of its divisors is an integer number (110236).

2³⁸⁵⁸¹⁹ is an apocalyptic number.

385819 is a deficient number, since it is larger than the sum of its proper divisors (55125).

385819 is an equidigital number, since it uses as much as digits as its factorization.

385819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55124.

The product of its digits is 8640, while the sum is 34.

The square root of 385819 is about 621.1433006964. The cubic root of 385819 is about 72.7994118014.

It can be divided in two parts, 38 and 5819, that multiplied together give a palindrome (221122).

The spelling of 385819 in words is "three hundred eighty-five thousand, eight hundred nineteen".