384805 has 4 divisors (see below), whose sum is σ = 461772. Its totient is φ = 307840.

The previous prime is 384779. The next prime is 384817. The reversal of 384805 is 508483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 508483 = 461 ⋅1103.

It can be written as a sum of positive squares in 2 ways, for example, as 73441 + 311364 = 271^2 + 558^2 .

It is not a de Polignac number, because 384805 - 2⁵ = 384773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38476 + ... + 38485.

It is an arithmetic number, because the mean of its divisors is an integer number (115443).

2³⁸⁴⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

384805 is a deficient number, since it is larger than the sum of its proper divisors (76967).

384805 is an equidigital number, since it uses as much as digits as its factorization.

384805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76966.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 384805 is about 620.3265269195. The cubic root of 384805 is about 72.7355793069.

The spelling of 384805 in words is "three hundred eighty-four thousand, eight hundred five".