1268664344 has 16 divisors (see below), whose sum is σ = 2384170800. Its totient is φ = 632885472.

The previous prime is 1268664329. The next prime is 1268664427. The reversal of 1268664344 is 4434668621.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1268664295 and 1268664304.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177107 + ... + 184130.

It is an arithmetic number, because the mean of its divisors is an integer number (149010675).

Almost surely, 2^1268664344 is an apocalyptic number.

It is an amenable number.

1268664344 is a deficient number, since it is larger than the sum of its proper divisors (1115506456).

1268664344 is a wasteful number, since it uses less digits than its factorization.

1268664344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361682 (or 361678 counting only the distinct ones).

The product of its digits is 663552, while the sum is 44.

The square root of 1268664344 is about 35618.3147271176. The cubic root of 1268664344 is about 1082.5523606104.

The spelling of 1268664344 in words is "one billion, two hundred sixty-eight million, six hundred sixty-four thousand, three hundred forty-four".