394673664040 has 64 divisors (see below), whose sum is σ = 897670926720. Its totient is φ = 156156000000.

The previous prime is 394673664031. The next prime is 394673664041. The reversal of 394673664040 is 40466376493.

It is not an unprimeable number, because it can be changed into a prime (394673664041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4199565 + ... + 4292515.

It is an arithmetic number, because the mean of its divisors is an integer number (14026108230).

Almost surely, 2^394673664040 is an apocalyptic number.

It is an amenable number.

394673664040 is an abundant number, since it is smaller than the sum of its proper divisors (502997262680).

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

394673664040 is a wasteful number, since it uses less digits than its factorization.

394673664040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94114 (or 94110 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 52.

The spelling of 394673664040 in words is "three hundred ninety-four billion, six hundred seventy-three million, six hundred sixty-four thousand, forty".