384689 has 6 divisors (see below), whose sum is σ = 396774. Its totient is φ = 372960.

The previous prime is 384673. The next prime is 384691. The reversal of 384689 is 986483.

It can be written as a sum of positive squares in 3 ways, for example, as 250000 + 134689 = 500^2 + 367^2 .

It is not a de Polignac number, because 384689 - 2⁴ = 384673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (384619) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1229 + ... + 1509.

It is an arithmetic number, because the mean of its divisors is an integer number (66129).

2³⁸⁴⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

384689 is a deficient number, since it is larger than the sum of its proper divisors (12085).

384689 is an equidigital number, since it uses as much as digits as its factorization.

384689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355 (or 318 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 384689 is about 620.2330207269. The cubic root of 384689 is about 72.7282698253.

The spelling of 384689 in words is "three hundred eighty-four thousand, six hundred eighty-nine".