394205023407 has 12 divisors (see below), whose sum is σ = 569148081864. Its totient is φ = 242587706400.

The previous prime is 394205023339. The next prime is 394205023417. The reversal of 394205023407 is 704320502493.

It is not a de Polignac number, because 394205023407 - 2⁸ = 394205023151 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394205023417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 388761844 + ... + 388762857.

It is an arithmetic number, because the mean of its divisors is an integer number (47429006822).

Almost surely, 2^394205023407 is an apocalyptic number.

394205023407 is a deficient number, since it is larger than the sum of its proper divisors (174943058457).

394205023407 is a wasteful number, since it uses less digits than its factorization.

394205023407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777524730 (or 777524717 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 39.

The spelling of 394205023407 in words is "three hundred ninety-four billion, two hundred five million, twenty-three thousand, four hundred seven".