1306189568 has 18 divisors (see below), whose sum is σ = 2607277344. Its totient is φ = 653094656.

The previous prime is 1306189567. The next prime is 1306189571. The reversal of 1306189568 is 8659816031.

It is a super-2 number, since 2×1306189568² = 3412262375104053248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306189567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2550896 + ... + 2551407.

Almost surely, 2^1306189568 is an apocalyptic number.

It is an amenable number.

1306189568 is a deficient number, since it is larger than the sum of its proper divisors (1301087776).

1306189568 is an frugal number, since it uses more digits than its factorization.

1306189568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5102319 (or 5102305 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 1306189568 is about 36141.2446935631. The cubic root of 1306189568 is about 1093.1222568269.

The spelling of 1306189568 in words is "one billion, three hundred six million, one hundred eighty-nine thousand, five hundred sixty-eight".