394012642 has 16 divisors (see below), whose sum is σ = 598063032. Its totient is φ = 194664960.

The previous prime is 394012631. The next prime is 394012651. The reversal of 394012642 is 246210493.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 91565761 + 302446881 = 9569^2 + 17391^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164292 + ... + 166672.

Almost surely, 2^394012642 is an apocalyptic number.

394012642 is a deficient number, since it is larger than the sum of its proper divisors (204050390).

394012642 is a wasteful number, since it uses less digits than its factorization.

394012642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3333.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 394012642 is about 19849.7516861043. The cubic root of 394012642 is about 733.1115337950. Note that the first 3 decimals are identical.

The spelling of 394012642 in words is "three hundred ninety-four million, twelve thousand, six hundred forty-two".