393428 has 12 divisors (see below), whose sum is σ = 786912. Its totient is φ = 168600.

The previous prime is 393413. The next prime is 393451. The reversal of 393428 is 824393.

393428 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 393428.

It is a congruent number.

It is an unprimeable number.

393428 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, 6998 + ... + 7053.

It is an arithmetic number, because the mean of its divisors is an integer number (65576).

2³⁹³⁴²⁸ is an apocalyptic number.

It is an amenable number.

393428 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

393428 is a wasteful number, since it uses less digits than its factorization.

393428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14062 (or 14060 counting only the distinct ones).

The product of its digits is 5184, while the sum is 29.

The square root of 393428 is about 627.2383916821. The cubic root of 393428 is about 73.2748753591.

The spelling of 393428 in words is "three hundred ninety-three thousand, four hundred twenty-eight".