394028404 has 72 divisors (see below), whose sum is σ = 880800480. Its totient is φ = 152510400.

The previous prime is 394028381. The next prime is 394028413. The reversal of 394028404 is 404820493.

It is a self number, because there is not a number n which added to its sum of digits gives 394028404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 385414 + ... + 386434.

It is an arithmetic number, because the mean of its divisors is an integer number (12233340).

Almost surely, 2^394028404 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 394028404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (440400240).

394028404 is an abundant number, since it is smaller than the sum of its proper divisors (486772076).

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

394028404 is a wasteful number, since it uses less digits than its factorization.

394028404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229 (or 1220 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 394028404 is about 19850.1487148082. The cubic root of 394028404 is about 733.1213094119.

Adding to 394028404 its reverse (404820493), we get a palindrome (798848897).

The spelling of 394028404 in words is "three hundred ninety-four million, twenty-eight thousand, four hundred four".