394137254920 has 16 divisors (see below), whose sum is σ = 886808823660. Its totient is φ = 157654901952.

The previous prime is 394137254911. The next prime is 394137254921. The reversal of 394137254920 is 29452731493.

It can be written as a sum of positive squares in 2 ways, for example, as 393723620676 + 413634244 = 627474^2 + 20338^2 .

It is not an unprimeable number, because it can be changed into a prime (394137254921) 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 3 ways as a sum of consecutive naturals, for example, 4926715647 + ... + 4926715726.

Almost surely, 2^394137254920 is an apocalyptic number.

It is an amenable number.

394137254920 is an abundant number, since it is smaller than the sum of its proper divisors (492671568740).

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

394137254920 is a wasteful number, since it uses less digits than its factorization.

394137254920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9853431384 (or 9853431380 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 49.

The spelling of 394137254920 in words is "three hundred ninety-four billion, one hundred thirty-seven million, two hundred fifty-four thousand, nine hundred twenty".