384427 has 4 divisors (see below), whose sum is σ = 404680. Its totient is φ = 364176.

The previous prime is 384407. The next prime is 384437. The reversal of 384427 is 724483.

384427 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 724483 = 257 ⋅2819.

It is a cyclic number.

It is not a de Polignac number, because 384427 - 2⁷ = 384299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 384395 and 384404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384407) 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 3 ways as a sum of consecutive naturals, for example, 10098 + ... + 10135.

It is an arithmetic number, because the mean of its divisors is an integer number (101170).

2³⁸⁴⁴²⁷ is an apocalyptic number.

384427 is a deficient number, since it is larger than the sum of its proper divisors (20253).

384427 is a wasteful number, since it uses less digits than its factorization.

384427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20252.

The product of its digits is 5376, while the sum is 28.

The square root of 384427 is about 620.0217738112. The cubic root of 384427 is about 72.7117550699.

It can be divided in two parts, 38 and 4427, that added together give a triangular number (4465 = T₉₄).

The spelling of 384427 in words is "three hundred eighty-four thousand, four hundred twenty-seven".