394102816 has 12 divisors (see below), whose sum is σ = 775889982. Its totient is φ = 197051392.

The previous prime is 394102759. The next prime is 394102847. The reversal of 394102816 is 618201493.

It can be written as a sum of positive squares in only one way, i.e., 392198416 + 1904400 = 19804^2 + 1380^2 .

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 as a sum of consecutive naturals, namely, 6157825 + ... + 6157888.

Almost surely, 2^394102816 is an apocalyptic number.

It is an amenable number.

394102816 is a deficient number, since it is larger than the sum of its proper divisors (381787166).

394102816 is a wasteful number, since it uses less digits than its factorization.

394102816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12315723 (or 12315715 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 394102816 is about 19852.0229699645. The cubic root of 394102816 is about 733.1674563297.

The spelling of 394102816 in words is "three hundred ninety-four million, one hundred two thousand, eight hundred sixteen".