394864640367 has 16 divisors (see below), whose sum is σ = 567712965120. Its totient is φ = 243305553600.

The previous prime is 394864640323. The next prime is 394864640377. The reversal of 394864640367 is 763046468493.

It is a happy number.

It is not a de Polignac number, because 394864640367 - 2¹⁴ = 394864623983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 394864640367.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394864640377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84478759 + ... + 84483432.

It is an arithmetic number, because the mean of its divisors is an integer number (35482060320).

Almost surely, 2^394864640367 is an apocalyptic number.

394864640367 is a deficient number, since it is larger than the sum of its proper divisors (172848324753).

394864640367 is a wasteful number, since it uses less digits than its factorization.

394864640367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168962254.

The product of its (nonzero) digits is 62705664, while the sum is 60.

The spelling of 394864640367 in words is "three hundred ninety-four billion, eight hundred sixty-four million, six hundred forty thousand, three hundred sixty-seven".