394143476 has 12 divisors (see below), whose sum is σ = 694145508. Its totient is φ = 195816192.

The previous prime is 394143427. The next prime is 394143527. The reversal of 394143476 is 674341493.

It can be written as a sum of positive squares in 2 ways, for example, as 284731876 + 109411600 = 16874^2 + 10460^2 .

It is a congruent number.

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, 313181 + ... + 314436.

It is an arithmetic number, because the mean of its divisors is an integer number (57845459).

Almost surely, 2^394143476 is an apocalyptic number.

It is an amenable number.

394143476 is a deficient number, since it is larger than the sum of its proper divisors (300002032).

394143476 is a wasteful number, since it uses less digits than its factorization.

394143476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627778 (or 627776 counting only the distinct ones).

The product of its digits is 217728, while the sum is 41.

The square root of 394143476 is about 19853.0470205457. The cubic root of 394143476 is about 733.1926693472.

The spelling of 394143476 in words is "three hundred ninety-four million, one hundred forty-three thousand, four hundred seventy-six".