378683685 has 12 divisors (see below), whose sum is σ = 656385132. Its totient is φ = 201964608.

The previous prime is 378683651. The next prime is 378683713. The reversal of 378683685 is 586386873.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 277922241 + 100761444 = 16671^2 + 10038^2 .

It is not a de Polignac number, because 378683685 - 2⁶ = 378683621 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4207552 + ... + 4207641.

It is an arithmetic number, because the mean of its divisors is an integer number (54698761).

Almost surely, 2^378683685 is an apocalyptic number.

It is an amenable number.

378683685 is a deficient number, since it is larger than the sum of its proper divisors (277701447).

378683685 is a wasteful number, since it uses less digits than its factorization.

378683685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8415204 (or 8415201 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The square root of 378683685 is about 19459.7966330586. The cubic root of 378683685 is about 723.4783368374.

The spelling of 378683685 in words is "three hundred seventy-eight million, six hundred eighty-three thousand, six hundred eighty-five".