394271378 has 16 divisors (see below), whose sum is σ = 635019264. Its totient is φ = 182925120.

The previous prime is 394271363. The next prime is 394271393. The reversal of 394271378 is 873172493.

It is an interprime number because it is at equal distance from previous prime (394271363) and next prime (394271393).

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 79250 + ... + 84077.

It is an arithmetic number, because the mean of its divisors is an integer number (39688704).

Almost surely, 2^394271378 is an apocalyptic number.

394271378 is a deficient number, since it is larger than the sum of its proper divisors (240747886).

394271378 is a wasteful number, since it uses less digits than its factorization.

394271378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163417.

The product of its digits is 254016, while the sum is 44.

The square root of 394271378 is about 19856.2679776437. The cubic root of 394271378 is about 733.2719692914.

The spelling of 394271378 in words is "three hundred ninety-four million, two hundred seventy-one thousand, three hundred seventy-eight".