384815 has 4 divisors (see below), whose sum is σ = 461784. Its totient is φ = 307848.

The previous prime is 384779. The next prime is 384817. The reversal of 384815 is 518483.

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 384815 - 2⁶ = 384751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 384815.

It is not an unprimeable number, because it can be changed into a prime (384817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38477 + ... + 38486.

It is an arithmetic number, because the mean of its divisors is an integer number (115446).

2³⁸⁴⁸¹⁵ is an apocalyptic number.

384815 is a deficient number, since it is larger than the sum of its proper divisors (76969).

384815 is an equidigital number, since it uses as much as digits as its factorization.

384815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76968.

The product of its digits is 3840, while the sum is 29.

The square root of 384815 is about 620.3345871383. The cubic root of 384815 is about 72.7362093658.

The spelling of 384815 in words is "three hundred eighty-four thousand, eight hundred fifteen".