394428 has 12 divisors (see below), whose sum is σ = 920360. Its totient is φ = 131472.

The previous prime is 394411. The next prime is 394453. The reversal of 394428 is 824493.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 394395 and 394404.

It is a congruent number.

It is an unprimeable number.

394428 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16423 + ... + 16446.

2³⁹⁴⁴²⁸ is an apocalyptic number.

It is an amenable number.

394428 is an abundant number, since it is smaller than the sum of its proper divisors (525932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

394428 is a wasteful number, since it uses less digits than its factorization.

394428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32876 (or 32874 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 394428 is about 628.0350308701. The cubic root of 394428 is about 73.3369052438.

The spelling of 394428 in words is "three hundred ninety-four thousand, four hundred twenty-eight".