394040493 has 36 divisors (see below), whose sum is σ = 715003744. Its totient is φ = 204692400.

The previous prime is 394040477. The next prime is 394040503.

394040493 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 394040493 - 2⁴ = 394040477 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394040293) 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 35 ways as a sum of consecutive naturals, for example, 18223 + ... + 33468.

Almost surely, 2^394040493 is an apocalyptic number.

394040493 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

394040493 is a deficient number, since it is larger than the sum of its proper divisors (320963251).

394040493 is a wasteful number, since it uses less digits than its factorization.

394040493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51726 (or 51712 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 394040493 is about 19850.4532190074. The cubic root of 394040493 is about 733.1288068518.

The spelling of 394040493 in words is "three hundred ninety-four million, forty thousand, four hundred ninety-three".