394180828 has 12 divisors (see below), whose sum is σ = 705859000. Its totient is φ = 192506832.

The previous prime is 394180817. The next prime is 394180837. The reversal of 394180828 is 828081493.

It is a super-3 number, since 3×394180828³ (a number of 27 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1145703 + ... + 1146046.

Almost surely, 2^394180828 is an apocalyptic number.

It is an amenable number.

394180828 is a deficient number, since it is larger than the sum of its proper divisors (311678172).

394180828 is a wasteful number, since it uses less digits than its factorization.

394180828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291796 (or 2291794 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 394180828 is about 19853.9877102813. The cubic root of 394180828 is about 733.2158295661.

The spelling of 394180828 in words is "three hundred ninety-four million, one hundred eighty thousand, eight hundred twenty-eight".