394236478212 has 24 divisors (see below), whose sum is σ = 959880121536. Its totient is φ = 125698587168.

The previous prime is 394236478211. The next prime is 394236478243. The reversal of 394236478212 is 212874632493.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (394236478211) by changing a digit.

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, 714196243 + ... + 714196794.

It is an arithmetic number, because the mean of its divisors is an integer number (39995005064).

Almost surely, 2^394236478212 is an apocalyptic number.

It is an amenable number.

394236478212 is an abundant number, since it is smaller than the sum of its proper divisors (565643643324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

394236478212 is a wasteful number, since it uses less digits than its factorization.

394236478212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428393067 (or 1428393065 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 51.

The spelling of 394236478212 in words is "three hundred ninety-four billion, two hundred thirty-six million, four hundred seventy-eight thousand, two hundred twelve".