393449589892 has 6 divisors (see below), whose sum is σ = 688536782318. Its totient is φ = 196724794944.

The previous prime is 393449589889. The next prime is 393449589917. The reversal of 393449589892 is 298985944393.

It can be written as a sum of positive squares in only one way, i.e., 310634563716 + 82815026176 = 557346^2 + 287776^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49181198733 + ... + 49181198740.

Almost surely, 2^393449589892 is an apocalyptic number.

It is an amenable number.

393449589892 is a deficient number, since it is larger than the sum of its proper divisors (295087192426).

393449589892 is a wasteful number, since it uses less digits than its factorization.

393449589892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98362397477 (or 98362397475 counting only the distinct ones).

The product of its digits is 604661760, while the sum is 73.

The spelling of 393449589892 in words is "three hundred ninety-three billion, four hundred forty-nine million, five hundred eighty-nine thousand, eight hundred ninety-two".