394550801040 has 80 divisors (see below), whose sum is σ = 1334299081536. Its totient is φ = 95648678400.

The previous prime is 394550801011. The next prime is 394550801041. The reversal of 394550801040 is 40108055493.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 394550801040.

It is not an unprimeable number, because it can be changed into a prime (394550801041) 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, 74722891 + ... + 74728170.

Almost surely, 2^394550801040 is an apocalyptic number.

394550801040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

394550801040 is an abundant number, since it is smaller than the sum of its proper divisors (939748280496).

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

394550801040 is a wasteful number, since it uses less digits than its factorization.

394550801040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149451088 (or 149451082 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 394550801040 in words is "three hundred ninety-four billion, five hundred fifty million, eight hundred one thousand, forty".