384789 has 8 divisors (see below), whose sum is σ = 524160. Its totient is φ = 250976.

The previous prime is 384779. The next prime is 384817. The reversal of 384789 is 987483.

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 384789 - 2⁴ = 384773 is a prime.

It is a Curzon number.

384789 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384719) 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, 1224 + ... + 1505.

It is an arithmetic number, because the mean of its divisors is an integer number (65520).

2³⁸⁴⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

384789 is a deficient number, since it is larger than the sum of its proper divisors (139371).

384789 is a wasteful number, since it uses less digits than its factorization.

384789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2779.

The product of its digits is 48384, while the sum is 39.

The square root of 384789 is about 620.3136303516. The cubic root of 384789 is about 72.7345711899.

The spelling of 384789 in words is "three hundred eighty-four thousand, seven hundred eighty-nine".