394128 has 120 divisors (see below), whose sum is σ = 1392768. Its totient is φ = 101376.

The previous prime is 394123. The next prime is 394129. The reversal of 394128 is 821493.

It is a nude number because it is divisible by every one of its digits.

It is one of the 548 Lynch-Bell numbers.

It is not an unprimeable number, because it can be changed into a prime (394123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17125 + ... + 17147.

2³⁹⁴¹²⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (696384).

394128 is an abundant number, since it is smaller than the sum of its proper divisors (998640).

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

394128 is a wasteful number, since it uses less digits than its factorization.

394128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61 (or 52 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 394128 is about 627.7961452574. The cubic root of 394128 is about 73.3183072979.

It can be divided in two parts, 3941 and 28, that added together give a square (3969 = 63²).

The spelling of 394128 in words is "three hundred ninety-four thousand, one hundred twenty-eight".