384489 has 24 divisors (see below), whose sum is σ = 673920. Its totient is φ = 206208.

The previous prime is 384487. The next prime is 384497. The reversal of 384489 is 984483.

It is not a de Polignac number, because 384489 - 2¹ = 384487 is a prime.

It is a super-2 number, since 2×384489² = 295663582242, which contains 22 as substring.

It is an Ulam number.

It is a Curzon 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 384489.

It is not an unprimeable number, because it can be changed into a prime (384481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 892 + ... + 1250.

It is an arithmetic number, because the mean of its divisors is an integer number (28080).

2³⁸⁴⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

384489 is a deficient number, since it is larger than the sum of its proper divisors (289431).

384489 is a wasteful number, since it uses less digits than its factorization.

384489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 386 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 384489 is about 620.0717700396. The cubic root of 384489 is about 72.7156638194.

The spelling of 384489 in words is "three hundred eighty-four thousand, four hundred eighty-nine".