384505 has 8 divisors (see below), whose sum is σ = 503424. Its totient is φ = 279600.

The previous prime is 384497. The next prime is 384509. The reversal of 384505 is 505483.

It is a happy number.

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

It is not a de Polignac number, because 384505 - 2³ = 384497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 384505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3441 + ... + 3550.

It is an arithmetic number, because the mean of its divisors is an integer number (62928).

2³⁸⁴⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

384505 is a deficient number, since it is larger than the sum of its proper divisors (118919).

384505 is a wasteful number, since it uses less digits than its factorization.

384505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7007.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 384505 is about 620.0846716377. The cubic root of 384505 is about 72.7166724607.

Adding to 384505 its reverse (505483), we get a palindrome (889988).

The spelling of 384505 in words is "three hundred eighty-four thousand, five hundred five".