1393397919268 has 12 divisors (see below), whose sum is σ = 2438492627340. Its totient is φ = 696685740032.

The previous prime is 1393397919257. The next prime is 1393397919271. The reversal of 1393397919268 is 8629197933931.

It can be written as a sum of positive squares in 2 ways, for example, as 650977876224 + 742420043044 = 806832^2 + 861638^2 .

It is a super-2 number, since 2×1393397919268² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1393397919197 and 1393397919206.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3065821 + ... + 3490852.

It is an arithmetic number, because the mean of its divisors is an integer number (203207718945).

Almost surely, 2^{1393397919268} is an apocalyptic number.

It is an amenable number.

1393397919268 is a deficient number, since it is larger than the sum of its proper divisors (1045094708072).

1393397919268 is a wasteful number, since it uses less digits than its factorization.

1393397919268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6609806 (or 6609804 counting only the distinct ones).

The product of its digits is 119042784, while the sum is 70.

The spelling of 1393397919268 in words is "one trillion, three hundred ninety-three billion, three hundred ninety-seven million, nine hundred nineteen thousand, two hundred sixty-eight".