394891012 has 24 divisors (see below), whose sum is σ = 709773120. Its totient is φ = 192165600.

The previous prime is 394890983. The next prime is 394891019. The reversal of 394891012 is 210198493.

It is a super-2 number, since 2×394891012² = 311877822716768288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (394891019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15553 + ... + 32119.

It is an arithmetic number, because the mean of its divisors is an integer number (29573880).

Almost surely, 2^394891012 is an apocalyptic number.

It is an amenable number.

394891012 is a deficient number, since it is larger than the sum of its proper divisors (314882108).

394891012 is a wasteful number, since it uses less digits than its factorization.

394891012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16731 (or 16729 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 394891012 is about 19871.8648344840. The cubic root of 394891012 is about 733.6559031783.

The spelling of 394891012 in words is "three hundred ninety-four million, eight hundred ninety-one thousand, twelve".