394838428 has 12 divisors (see below), whose sum is σ = 696408832. Its totient is φ = 195864480.

The previous prime is 394838407. The next prime is 394838441. The reversal of 394838428 is 824838493.

It is a super-2 number, since 2×394838428² = 311794768451022368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388113 + ... + 389128.

Almost surely, 2^394838428 is an apocalyptic number.

It is an amenable number.

394838428 is a deficient number, since it is larger than the sum of its proper divisors (301570404).

394838428 is a wasteful number, since it uses less digits than its factorization.

394838428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777372 (or 777370 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 49.

The square root of 394838428 is about 19870.5417138034. The cubic root of 394838428 is about 733.6233369990.

The spelling of 394838428 in words is "three hundred ninety-four million, eight hundred thirty-eight thousand, four hundred twenty-eight".