394193876 has 6 divisors (see below), whose sum is σ = 689839290. Its totient is φ = 197096936.

The previous prime is 394193869. The next prime is 394193881. The reversal of 394193876 is 678391493.

It can be written as a sum of positive squares in only one way, i.e., 393070276 + 1123600 = 19826^2 + 1060^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49274231 + ... + 49274238.

It is an arithmetic number, because the mean of its divisors is an integer number (114973215).

Almost surely, 2^394193876 is an apocalyptic number.

It is an amenable number.

394193876 is a deficient number, since it is larger than the sum of its proper divisors (295645414).

394193876 is a wasteful number, since it uses less digits than its factorization.

394193876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98548473 (or 98548471 counting only the distinct ones).

The product of its digits is 979776, while the sum is 50.

The square root of 394193876 is about 19854.3163065365. The cubic root of 394193876 is about 733.2239196726.

The spelling of 394193876 in words is "three hundred ninety-four million, one hundred ninety-three thousand, eight hundred seventy-six".