394357816 has 32 divisors (see below), whose sum is σ = 789528960. Its totient is φ = 184216032.

The previous prime is 394357807. The next prime is 394357841. The reversal of 394357816 is 618753493.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (46).

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 7 ways as a sum of consecutive naturals, for example, 17010 + ... + 32833.

It is an arithmetic number, because the mean of its divisors is an integer number (24672780).

Almost surely, 2^394357816 is an apocalyptic number.

It is an amenable number.

394357816 is an abundant number, since it is smaller than the sum of its proper divisors (395171144).

394357816 is a wasteful number, since it uses less digits than its factorization.

394357816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49915 (or 49911 counting only the distinct ones).

The product of its digits is 544320, while the sum is 46.

The square root of 394357816 is about 19858.4444506613. Note that the first 4 decimals coincide. The cubic root of 394357816 is about 733.3255516162.

The spelling of 394357816 in words is "three hundred ninety-four million, three hundred fifty-seven thousand, eight hundred sixteen".