394882157640 has 32 divisors (see below), whose sum is σ = 1184646473280. Its totient is φ = 105301908672.

The previous prime is 394882157629. The next prime is 394882157671. The reversal of 394882157640 is 46751288493.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1645342204 + ... + 1645342443.

It is an arithmetic number, because the mean of its divisors is an integer number (37020202290).

It is a 2-persistent number, because it is pandigital, and so is 2⋅394882157640 = 789764315280, but 3⋅394882157640 = 1184646472920 is not.

Almost surely, 2^394882157640 is an apocalyptic number.

394882157640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

394882157640 is an abundant number, since it is smaller than the sum of its proper divisors (789764315640).

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

394882157640 is a wasteful number, since it uses less digits than its factorization.

394882157640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3290684661 (or 3290684657 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 57.

The spelling of 394882157640 in words is "three hundred ninety-four billion, eight hundred eighty-two million, one hundred fifty-seven thousand, six hundred forty".