384428 has 12 divisors (see below), whose sum is σ = 733992. Its totient is φ = 174720.

The previous prime is 384407. The next prime is 384437. The reversal of 384428 is 824483.

384428 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 384428.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4325 + ... + 4412.

It is an arithmetic number, because the mean of its divisors is an integer number (61166).

2³⁸⁴⁴²⁸ is an apocalyptic number.

It is an amenable number.

384428 is a deficient number, since it is larger than the sum of its proper divisors (349564).

384428 is a wasteful number, since it uses less digits than its factorization.

384428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8752 (or 8750 counting only the distinct ones).

The product of its digits is 6144, while the sum is 29.

The square root of 384428 is about 620.0225802340. The cubic root of 384428 is about 72.7118181176.

The spelling of 384428 in words is "three hundred eighty-four thousand, four hundred twenty-eight".