1306813688 has 16 divisors (see below), whose sum is σ = 2507259480. Its totient is φ = 638211168.

The previous prime is 1306813667. The next prime is 1306813691. The reversal of 1306813688 is 8863186031.

It is a super-2 number, since 2×1306813688² = 3415524030288322688, which contains 22 as substring.

It is a congruent number.

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, 1899095 + ... + 1899782.

Almost surely, 2^1306813688 is an apocalyptic number.

It is an amenable number.

1306813688 is a deficient number, since it is larger than the sum of its proper divisors (1200445792).

1306813688 is a wasteful number, since it uses less digits than its factorization.

1306813688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3798926 (or 3798922 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 1306813688 is about 36149.8781187434. The cubic root of 1306813688 is about 1093.2963333536.

The spelling of 1306813688 in words is "one billion, three hundred six million, eight hundred thirteen thousand, six hundred eighty-eight".