3940321230394 has 4 divisors (see below), whose sum is σ = 5910481845594. Its totient is φ = 1970160615196.

The previous prime is 3940321230371. The next prime is 3940321230401. The reversal of 3940321230394 is 4930321230493.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3060452842225 + 879868388169 = 1749415^2 + 938013^2 .

It is a super-2 number, since 2×3940321230394² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3940321230394.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 985080307597 + ... + 985080307600.

Almost surely, 2^{3940321230394} is an apocalyptic number.

3940321230394 is a deficient number, since it is larger than the sum of its proper divisors (1970160615200).

3940321230394 is a wasteful number, since it uses less digits than its factorization.

3940321230394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970160615199.

The product of its (nonzero) digits is 419904, while the sum is 43.

Subtracting 3940321230394 from its reverse (4930321230493), we obtain a palindrome (990000000099).

The spelling of 3940321230394 in words is "three trillion, nine hundred forty billion, three hundred twenty-one million, two hundred thirty thousand, three hundred ninety-four".