1306778168 has 16 divisors (see below), whose sum is σ = 2594339280. Its totient is φ = 614954368.

The previous prime is 1306778111. The next prime is 1306778171. The reversal of 1306778168 is 8618776031.

It is a super-2 number, since 2×1306778168² = 3415338360722872448, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4804196 + ... + 4804467.

It is an arithmetic number, because the mean of its divisors is an integer number (162146205).

Almost surely, 2^1306778168 is an apocalyptic number.

It is an amenable number.

1306778168 is a deficient number, since it is larger than the sum of its proper divisors (1287561112).

1306778168 is a wasteful number, since it uses less digits than its factorization.

1306778168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9608686 (or 9608682 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 1306778168 is about 36149.3868274415. The cubic root of 1306778168 is about 1093.2864277749.

The spelling of 1306778168 in words is "one billion, three hundred six million, seven hundred seventy-eight thousand, one hundred sixty-eight".