394769680 has 20 divisors (see below), whose sum is σ = 917839692. Its totient is φ = 157907840.

The previous prime is 394769671. The next prime is 394769693. The reversal of 394769680 is 86967493.

It can be written as a sum of positive squares in 2 ways, for example, as 253064464 + 141705216 = 15908^2 + 11904^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2467231 + ... + 2467390.

Almost surely, 2^394769680 is an apocalyptic number.

It is an amenable number.

394769680 is an abundant number, since it is smaller than the sum of its proper divisors (523070012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

394769680 is a wasteful number, since it uses less digits than its factorization.

394769680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4934634 (or 4934628 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 52.

The square root of 394769680 is about 19868.8117410176. The cubic root of 394769680 is about 733.5807558138.

The spelling of 394769680 in words is "three hundred ninety-four million, seven hundred sixty-nine thousand, six hundred eighty".