394620838 has 16 divisors (see below), whose sum is σ = 602640000. Its totient is φ = 193771072.

The previous prime is 394620829. The next prime is 394620857. The reversal of 394620838 is 838026493.

It is a junction number, because it is equal to n+sod(n) for n = 394620794 and 394620803.

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 7 ways as a sum of consecutive naturals, for example, 19083 + ... + 33961.

It is an arithmetic number, because the mean of its divisors is an integer number (37665000).

Almost surely, 2^394620838 is an apocalyptic number.

394620838 is a deficient number, since it is larger than the sum of its proper divisors (208019162).

394620838 is a wasteful number, since it uses less digits than its factorization.

394620838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15119.

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 394620838 is about 19865.0657688315. The cubic root of 394620838 is about 733.4885490092.

The spelling of 394620838 in words is "three hundred ninety-four million, six hundred twenty thousand, eight hundred thirty-eight".